mirror of
https://github.com/anonaddy/anonaddy.git
synced 2025-12-28 07:55:07 +00:00
633 lines
24 KiB
PHP
633 lines
24 KiB
PHP
<?php
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namespace App\Console\Commands;
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use App\Mail\ForwardEmail;
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use App\Mail\ReplyToEmail;
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use App\Mail\SendFromEmail;
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use App\Models\Alias;
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use App\Models\Domain;
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use App\Models\EmailData;
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use App\Models\OutboundMessage;
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use App\Models\Username;
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use App\Notifications\DisallowedReplySendAttempt;
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use App\Notifications\FailedDeliveryNotification;
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use App\Notifications\NearBandwidthLimit;
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use App\Notifications\SpamReplySendAttempt;
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use Illuminate\Console\Command;
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use Illuminate\Support\Facades\Cache;
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use Illuminate\Support\Facades\Log;
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use Illuminate\Support\Facades\Mail;
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use Illuminate\Support\Facades\Storage;
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use Illuminate\Support\Str;
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use ParagonIE\ConstantTime\Base32;
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use PhpMimeMailParser\Parser;
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use Ramsey\Uuid\Uuid;
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class ReceiveEmail extends Command
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{
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/**
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* The name and signature of the console command.
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*
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* @var string
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*/
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protected $signature = 'anonaddy:receive-email
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{file=stream : The file of the email}
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{--sender= : The sender of the email}
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{--recipient=* : The recipient of the email}
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{--local_part=* : The local part of the recipient}
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{--extension=* : The extension of the local part of the recipient}
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{--domain=* : The domain of the recipient}
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{--size= : The size of the email in bytes}';
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/**
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* The console command description.
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*
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* @var string
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*/
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protected $description = 'Receive email from postfix pipe';
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protected $parser;
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protected $senderFrom;
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protected $size;
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protected $rawEmail;
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/**
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* Create a new command instance.
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct();
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}
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/**
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* Execute the console command.
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*
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* @return mixed
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*/
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public function handle()
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{
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try {
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$this->exitIfFromSelf();
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$recipients = $this->getRecipients();
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$file = $this->argument('file');
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$this->parser = $this->getParser($file);
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$this->senderFrom = $this->getSenderFrom();
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// Divide the size of the email by the number of recipients (excluding any unsubscribe recipients) to prevent it being added multiple times.
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$recipientCount = $recipients->where('domain', '!=', 'unsubscribe.'.config('anonaddy.domain'))->count();
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$this->size = $this->option('size') / ($recipientCount ? $recipientCount : 1);
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foreach ($recipients as $recipient) {
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// Check if VERP bounce
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if (substr($recipient['email'], 0, 2) === 'b_') {
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if ($outboundMessageId = $this->getIdFromVerp($recipient['email'])) {
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// Is a valid bounce
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$outboundMessage = OutboundMessage::with(['user', 'alias', 'recipient'])->find($outboundMessageId);
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if (is_null($outboundMessage)) {
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// Must have been more than 7 days
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Log::info('VERP outboundMessage not found');
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exit(0);
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}
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$bouncedAlias = $outboundMessage->alias;
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// If already bounced then forward to the user instead
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if (! $outboundMessage->bounced) {
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$this->handleBounce($outboundMessage);
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}
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if (in_array(strtolower($this->parser->getHeader('Auto-Submitted')), ['auto-replied', 'auto-generated']) && ! in_array($outboundMessage->email_type, ['R', 'S'])) {
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Log::info('VERP auto-response to forward/notification, username: '.$outboundMessage->user?->username.' outboundMessageID: '.$outboundMessageId);
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exit(0);
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}
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// If it is a notification then there is no alias so exit and log, may be an auto-reply to a notification.
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if (is_null($bouncedAlias)) {
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Log::info('VERP previously bounced/auto-response to notification, username: '.$outboundMessage->user?->username.' outboundMessageID: '.$outboundMessageId);
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exit(0);
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}
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// If it is not a bounce (could be auto-reply) then redirect to alias
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$recipient['email'] = $bouncedAlias->email;
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$recipient['local_part'] = $bouncedAlias->local_part;
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$recipient['domain'] = $bouncedAlias->domain;
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}
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}
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// First determine if the alias already exists in the database
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if ($alias = Alias::firstWhere('email', $recipient['local_part'].'@'.$recipient['domain'])) {
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$user = $alias->user;
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if ($alias->aliasable_id) {
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$aliasable = $alias->aliasable;
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}
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} else {
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// Does not exist, must be a standard, username or custom domain alias
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$parentDomain = collect(config('anonaddy.all_domains'))
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->filter(function ($name) use ($recipient) {
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return Str::endsWith($recipient['domain'], $name);
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})
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->first();
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if (! empty($parentDomain)) {
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// It is standard or username alias
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$subdomain = substr($recipient['domain'], 0, strrpos($recipient['domain'], '.'.$parentDomain)); // e.g. johndoe
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if ($subdomain === 'unsubscribe') {
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$this->handleUnsubscribe($recipient);
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continue;
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}
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// Check if this is an username or standard alias
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if (! empty($subdomain)) {
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$username = Username::where('username', $subdomain)->first();
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$user = $username->user;
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$aliasable = $username;
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}
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} else {
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// It is a custom domain
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if ($customDomain = Domain::where('domain', $recipient['domain'])->first()) {
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$user = $customDomain->user;
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$aliasable = $customDomain;
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}
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}
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if (! isset($user) && ! empty(config('anonaddy.admin_username'))) {
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$user = Username::where('username', config('anonaddy.admin_username'))->first()?->user;
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}
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}
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// If there is still no user or the user has no verified default recipient then continue.
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if (! isset($user) || ! $user->hasVerifiedDefaultRecipient()) {
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continue;
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}
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$this->checkBandwidthLimit($user);
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$this->checkRateLimit($user);
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// Check whether this email is a reply/send from or a new email to be forwarded.
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$destination = Str::replaceLast('=', '@', $recipient['extension']);
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$validEmailDestination = filter_var($destination, FILTER_VALIDATE_EMAIL);
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if ($validEmailDestination) {
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$verifiedRecipient = $user->getVerifiedRecipientByEmail($this->senderFrom);
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} else {
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$verifiedRecipient = null;
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}
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if ($verifiedRecipient?->can_reply_send) {
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// Check if the Dmarc allow or spam headers are present from Rspamd
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if (! $this->parser->getHeader('X-AnonAddy-Dmarc-Allow')) {
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// Notify user and exit
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$verifiedRecipient->notify(new SpamReplySendAttempt($recipient, $this->senderFrom, $this->parser->getHeader('X-AnonAddy-Authentication-Results')));
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exit(0);
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}
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if ($this->parser->getHeader('In-Reply-To') && $alias) {
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$this->handleReply($user, $alias, $validEmailDestination);
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} else {
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$this->handleSendFrom($user, $recipient, $alias ?? null, $aliasable ?? null, $validEmailDestination);
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}
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} elseif ($verifiedRecipient?->can_reply_send === false) {
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// Notify user that they have not allowed this recipient to reply and send from aliases
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$verifiedRecipient->notify(new DisallowedReplySendAttempt($recipient, $this->senderFrom, $this->parser->getHeader('X-AnonAddy-Authentication-Results')));
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exit(0);
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} else {
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// Check if the spam header is present from Rspamd
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$this->handleForward($user, $recipient, $alias ?? null, $aliasable ?? null, $this->parser->getHeader('X-AnonAddy-Spam') === 'Yes');
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}
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}
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} catch (\Throwable $e) {
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$this->error('4.3.0 An error has occurred, please try again later.');
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report($e);
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exit(1);
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}
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}
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protected function handleUnsubscribe($recipient)
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{
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$alias = Alias::find($recipient['local_part']);
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if ($alias && $alias->user->isVerifiedRecipient($this->senderFrom) && $this->parser->getHeader('X-AnonAddy-Dmarc-Allow')) {
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$alias->deactivate();
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}
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}
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protected function handleReply($user, $alias, $destination)
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{
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$emailData = new EmailData($this->parser, $this->option('sender'), $this->size, 'R');
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$message = new ReplyToEmail($user, $alias, $emailData);
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Mail::to($destination)->queue($message);
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}
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protected function handleSendFrom($user, $recipient, $alias, $aliasable, $destination)
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{
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if (is_null($alias)) {
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$alias = $user->aliases()->create([
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'email' => $recipient['local_part'].'@'.$recipient['domain'],
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'local_part' => $recipient['local_part'],
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'domain' => $recipient['domain'],
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'aliasable_id' => $aliasable?->id,
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'aliasable_type' => $aliasable ? 'App\\Models\\'.class_basename($aliasable) : null,
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]);
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// Hydrate all alias fields
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$alias->refresh();
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}
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$emailData = new EmailData($this->parser, $this->option('sender'), $this->size, 'S');
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$message = new SendFromEmail($user, $alias, $emailData);
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Mail::to($destination)->queue($message);
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}
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protected function handleForward($user, $recipient, $alias, $aliasable, $isSpam)
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{
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if (is_null($alias)) {
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// This is a new alias
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$alias = new Alias([
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'email' => $recipient['local_part'].'@'.$recipient['domain'],
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'local_part' => $recipient['local_part'],
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'domain' => $recipient['domain'],
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'aliasable_id' => $aliasable?->id,
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'aliasable_type' => $aliasable ? 'App\\Models\\'.class_basename($aliasable) : null,
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]);
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if ($user->hasExceededNewAliasLimit()) {
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$this->error('4.2.1 New aliases per hour limit exceeded for user.');
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exit(1);
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}
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if ($recipient['extension'] !== '') {
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$alias->extension = $recipient['extension'];
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$keys = explode('.', $recipient['extension']);
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$recipientIds = $user
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->recipients()
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->select(['id', 'email_verified_at'])
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->oldest()
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->get()
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->filter(function ($item, $key) use ($keys) {
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return in_array($key + 1, $keys) && ! is_null($item['email_verified_at']);
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})
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->pluck('id')
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->take(10)
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->toArray();
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}
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$user->aliases()->save($alias);
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// Hydrate all alias fields
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$alias->refresh();
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if (isset($recipientIds)) {
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$alias->recipients()->sync($recipientIds);
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}
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}
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$emailData = new EmailData($this->parser, $this->option('sender'), $this->size);
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$alias->verifiedRecipientsOrDefault()->each(function ($recipient) use ($alias, $emailData, $isSpam) {
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$message = (new ForwardEmail($alias, $emailData, $recipient, $isSpam));
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Mail::to($recipient->email)->queue($message);
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});
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}
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protected function handleBounce($outboundMessage)
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{
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// Collect the attachments
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$attachments = collect($this->parser->getAttachments());
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// Find the delivery report
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$deliveryReport = $attachments->filter(function ($attachment) {
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return $attachment->getContentType() === 'message/delivery-status';
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})->first();
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// Is not a bounce, may be an auto-reply so return
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if (! $deliveryReport) {
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return;
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}
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// Mark the outboundMessage as bounced
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$outboundMessage->markAsBounced();
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$dsn = $this->parseDeliveryStatus($deliveryReport->getMimePartStr());
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// Get the bounced email address
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$bouncedEmailAddress = isset($dsn['Final-recipient']) ? trim(Str::after($dsn['Final-recipient'], ';')) : null;
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$remoteMta = isset($dsn['Remote-mta']) ? trim(Str::after($dsn['Remote-mta'], ';')) : '';
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if (isset($dsn['Diagnostic-code']) && isset($dsn['Status'])) {
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// Try to determine the bounce type, HARD, SPAM, SOFT
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$bounceType = $this->getBounceType($dsn['Diagnostic-code'], $dsn['Status']);
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$diagnosticCode = trim(Str::limit($dsn['Diagnostic-code'], 497));
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} else {
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$bounceType = null;
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$diagnosticCode = null;
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}
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// To sort '5.7.1 (delivery not authorized, message refused)' as status
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if ($status = $dsn['Status'] ?? null) {
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if (Str::length($status) > 5) {
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if (is_null($diagnosticCode)) {
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$diagnosticCode = trim(Str::substr($status, 5, 497));
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}
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$status = trim(Str::substr($status, 0, 5));
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}
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}
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// Get the undelivered message
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$undeliveredMessage = $attachments->filter(function ($attachment) {
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return in_array($attachment->getContentType(), ['text/rfc822-headers', 'message/rfc822']);
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})->first();
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$undeliveredMessageHeaders = [];
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if ($undeliveredMessage) {
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$undeliveredMessageHeaders = $this->parseDeliveryStatus($undeliveredMessage->getMimePartStr());
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}
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// Get bounce user information
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$user = $outboundMessage->user;
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$alias = $outboundMessage->alias;
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$recipient = $outboundMessage->recipient;
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$emailType = $outboundMessage->getRawOriginal('email_type');
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if ($user) {
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$failedDeliveryId = Uuid::uuid4();
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if ($undeliveredMessage) {
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// Store the undelivered message if enabled by user. Do not store email verification notifications.
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if ($user->store_failed_deliveries && ! in_array($emailType, ['VR', 'VU'])) {
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$isStored = Storage::disk('local')->put("{$failedDeliveryId}.eml", $this->trimUndeliveredMessage($undeliveredMessage->getMimePartStr()));
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}
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}
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$failedDelivery = $user->failedDeliveries()->create([
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'id' => $failedDeliveryId,
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'recipient_id' => $recipient->id ?? null,
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'alias_id' => $alias->id ?? null,
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'is_stored' => $isStored ?? false,
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'bounce_type' => $bounceType,
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'remote_mta' => $remoteMta ?? null,
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'sender' => $undeliveredMessageHeaders['X-anonaddy-original-sender'] ?? null,
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'destination' => $bouncedEmailAddress,
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'email_type' => $emailType,
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'status' => $status ?? null,
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'code' => $diagnosticCode,
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'attempted_at' => $outboundMessage->created_at,
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]);
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// Check the aliases failed deliveries
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if ($alias) {
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// Decrement the alias forward count due to failed delivery
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if ($failedDelivery->getRawOriginal('email_type') === 'F' && $alias->emails_forwarded > 0) {
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$alias->decrement('emails_forwarded');
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}
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if ($failedDelivery->getRawOriginal('email_type') === 'R' && $alias->emails_replied > 0) {
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$alias->decrement('emails_replied');
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}
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if ($failedDelivery->getRawOriginal('email_type') === 'S' && $alias->emails_sent > 0) {
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$alias->decrement('emails_sent');
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}
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}
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} else {
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Log::info('User not found from outbound message, may have been deleted.');
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}
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// Check if the bounce is a Failed delivery notification and if so do not notify the user again
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if (! in_array($emailType, ['FDN'])) {
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$notifiable = $recipient?->email_verified_at ? $recipient : $user?->defaultRecipient;
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// Notify user of failed delivery
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if ($notifiable?->email_verified_at) {
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$notifiable->notify(new FailedDeliveryNotification($alias->email ?? null, $undeliveredMessageHeaders['X-anonaddy-original-sender'] ?? null, $undeliveredMessageHeaders['Subject'] ?? null, $failedDelivery?->is_stored, $user?->store_failed_deliveries, $recipient?->email));
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Log::info('FDN '.$emailType.': '.$notifiable->email);
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}
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}
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exit(0);
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}
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protected function checkBandwidthLimit($user)
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{
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if ($user->hasReachedBandwidthLimit()) {
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$user->update(['reject_until' => now()->endOfMonth()]);
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$this->error('4.2.1 Bandwidth limit exceeded for user. Please try again later.');
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exit(1);
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}
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if ($user->nearBandwidthLimit() && ! Cache::has("user:{$user->id}:near-bandwidth")) {
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$user->notify(new NearBandwidthLimit());
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Cache::put("user:{$user->id}:near-bandwidth", now()->toDateTimeString(), now()->addDay());
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}
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}
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protected function checkRateLimit($user)
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{
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\Illuminate\Support\Facades\Redis::throttle("user:{$user->id}:limit:emails")
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->allow(config('anonaddy.limit'))
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->every(3600)
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->then(
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function () {},
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function () use ($user) {
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$user->update(['defer_until' => now()->addHour()]);
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$this->error('4.2.1 Rate limit exceeded for user. Please try again later.');
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exit(1);
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}
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);
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}
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protected function getRecipients()
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{
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return collect($this->option('recipient'))->map(function ($item, $key) {
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return [
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'email' => $item,
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'local_part' => strtolower($this->option('local_part')[$key]),
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'extension' => $this->option('extension')[$key],
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'domain' => strtolower($this->option('domain')[$key]),
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];
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});
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}
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protected function getParser($file)
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{
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$parser = new Parser();
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// Fix some edge cases in from name e.g. "\" John Doe \"" <johndoe@example.com>
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$parser->addMiddleware(function ($mimePart, $next) {
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$part = $mimePart->getPart();
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if (isset($part['headers']['from'])) {
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$value = $part['headers']['from'];
|
|
$value = (is_array($value)) ? $value[0] : $value;
|
|
|
|
try {
|
|
mailparse_rfc822_parse_addresses($value);
|
|
} catch (\Exception $e) {
|
|
$part['headers']['from'] = str_replace('\\', '', $part['headers']['from']);
|
|
$mimePart->setPart($part);
|
|
}
|
|
}
|
|
|
|
return $next($mimePart);
|
|
});
|
|
|
|
if ($file === 'stream') {
|
|
$fd = fopen('php://stdin', 'r');
|
|
$this->rawEmail = '';
|
|
while (! feof($fd)) {
|
|
$this->rawEmail .= fread($fd, 1024);
|
|
}
|
|
fclose($fd);
|
|
$parser->setText($this->rawEmail);
|
|
} else {
|
|
$parser->setPath($file);
|
|
}
|
|
|
|
return $parser;
|
|
}
|
|
|
|
protected function parseDeliveryStatus($deliveryStatus)
|
|
{
|
|
$lines = explode(PHP_EOL, $deliveryStatus);
|
|
|
|
$result = [];
|
|
|
|
foreach ($lines as $line) {
|
|
if (preg_match('#^([^\s.]*):\s*(.*)\s*#', $line, $matches)) {
|
|
$key = ucfirst(strtolower($matches[1]));
|
|
|
|
if (empty($result[$key])) {
|
|
$result[$key] = trim($matches[2]);
|
|
}
|
|
} elseif (preg_match('/^\s+(.+)\s*/', $line) && isset($key)) {
|
|
$result[$key] .= ' '.$line;
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
protected function trimUndeliveredMessage($message)
|
|
{
|
|
return Str::after($message, 'Content-Type: message/rfc822'.PHP_EOL.PHP_EOL);
|
|
}
|
|
|
|
protected function getBounceType($code, $status)
|
|
{
|
|
if (preg_match("/(:?mailbox|address|user|account|recipient|@).*(:?rejected|unknown|disabled|unavailable|invalid|inactive|not exist|does(n't| not) exist)|(:?rejected|unknown|unavailable|no|illegal|invalid|no such).*(:?mailbox|address|user|account|recipient|alias)|(:?address|user|recipient) does(n't| not) have .*(:?mailbox|account)|returned to sender|(:?auth).*(:?required)/i", $code)) {
|
|
|
|
// If the status starts with 4 then return soft instead of hard
|
|
if (Str::startsWith($status, '4')) {
|
|
return 'soft';
|
|
}
|
|
|
|
return 'hard';
|
|
}
|
|
|
|
if (preg_match('/(:?spam|unsolicited|blacklisting|blacklisted|blacklist|554|mail content denied|reject for policy reason|mail rejected by destination domain|security issue)/i', $code)) {
|
|
return 'spam';
|
|
}
|
|
|
|
// No match for code but status starts with 5 e.g. 5.2.2
|
|
if (Str::startsWith($status, '5')) {
|
|
return 'hard';
|
|
}
|
|
|
|
return 'soft';
|
|
}
|
|
|
|
protected function getSenderFrom()
|
|
{
|
|
try {
|
|
// Ensure contains '@', may be malformed header which causes sends/replies to fail
|
|
$address = $this->parser->getAddresses('from')[0]['address'];
|
|
|
|
return Str::contains($address, '@') && filter_var($address, FILTER_VALIDATE_EMAIL) ? $address : $this->option('sender');
|
|
} catch (\Exception $e) {
|
|
return $this->option('sender');
|
|
}
|
|
}
|
|
|
|
protected function getIdFromVerp($verp)
|
|
{
|
|
$localPart = Str::beforeLast($verp, '@');
|
|
|
|
$parts = explode('_', $localPart);
|
|
|
|
if (count($parts) !== 3) {
|
|
Log::channel('single')->info('VERP invalid email: '.$verp);
|
|
|
|
return;
|
|
}
|
|
|
|
try {
|
|
$id = Base32::decodeNoPadding($parts[1]);
|
|
|
|
$signature = Base32::decodeNoPadding($parts[2]);
|
|
} catch (\Exception $e) {
|
|
Log::channel('single')->info('VERP base32 decode failure: '.$verp.' '.$e->getMessage());
|
|
|
|
return;
|
|
}
|
|
|
|
$expectedSignature = substr(hash_hmac('sha3-224', $id, config('anonaddy.secret')), 0, 8);
|
|
|
|
if ($signature !== $expectedSignature) {
|
|
Log::channel('single')->info('VERP invalid signature: '.$verp);
|
|
|
|
return;
|
|
}
|
|
|
|
return $id;
|
|
}
|
|
|
|
protected function exitIfFromSelf()
|
|
{
|
|
// To prevent recipient alias infinite nested looping.
|
|
if (in_array($this->option('sender'), [config('mail.from.address'), config('anonaddy.return_path')])) {
|
|
exit(0);
|
|
}
|
|
}
|
|
}
|