Update MailerAssertionsTrait.php: Adding Mailpit

I will add a link to Mailpit, as soon as Codeception/codeception.github.com#880 is merged.

Author: ThomasLandauer

src/Codeception/Module/Symfony/MailerAssertionsTrait.php

@@ -50,7 +50,7 @@ public function assertQueuedEmailCount(int $count, ?string $transport = null, st
     /**
      * Checks that no email was sent.
      * The check is based on `\Symfony\Component\Mailer\EventListener\MessageLoggerListener`, which means:
-     * If your app performs an HTTP redirect, you need to suppress it using [stopFollowingRedirects()](https://codeception.com/docs/modules/Symfony#stopFollowingRedirects) first; otherwise this check will *always* pass.
+     * If your app performs an HTTP redirect, you need to suppress it using [stopFollowingRedirects()](#stopFollowingRedirects) first; otherwise this check will *always* pass.
      */
     public function dontSeeEmailIsSent(): void
     {
@@ -60,7 +60,7 @@ public function dontSeeEmailIsSent(): void
     /**
      * Returns the last sent email.
      * The function is based on `\Symfony\Component\Mailer\EventListener\MessageLoggerListener`, which means:
-     * If your app performs an HTTP redirect after sending the email, you need to suppress it using [stopFollowingRedirects()](https://codeception.com/docs/modules/Symfony#stopFollowingRedirects) first.
+     * If your app performs an HTTP redirect after sending the email, you need to suppress it using [stopFollowingRedirects()](#stopFollowingRedirects) first.
      * See also: [grabSentEmails()](https://codeception.com/docs/modules/Symfony#grabSentEmails)
      *
      * ```php
@@ -82,7 +82,7 @@ public function grabLastSentEmail(): ?Email
     /**
      * Returns an array of all sent emails.
      * The function is based on `\Symfony\Component\Mailer\EventListener\MessageLoggerListener`, which means:
-     * If your app performs an HTTP redirect after sending the email, you need to suppress it using [stopFollowingRedirects()](https://codeception.com/docs/modules/Symfony#stopFollowingRedirects) first.
+     * If your app performs an HTTP redirect after sending the email, you need to suppress it using [stopFollowingRedirects()](#stopFollowingRedirects) first.
      * See also: [grabLastSentEmail()](https://codeception.com/docs/modules/Symfony#grabLastSentEmail)
      *
      * ```php
@@ -100,7 +100,12 @@ public function grabSentEmails(): array
     /**
      * Checks if the given number of emails was sent (default `$expectedCount`: 1).
      * The check is based on `\Symfony\Component\Mailer\EventListener\MessageLoggerListener`, which means:
-     * If your app performs an HTTP redirect after sending the email, you need to suppress it using [stopFollowingRedirects()](https://codeception.com/docs/modules/Symfony#stopFollowingRedirects) first.
+     * If your app performs an HTTP redirect after sending the email, you need to suppress it using [stopFollowingRedirects()](#stopFollowingRedirects) first.
+     *
+     * Limitation:
+     * If your mail is sent in a Symfony console command and you start that command in your test with [$I->runShellCommand()](https://codeception.com/docs/modules/Cli#runShellCommand),
+     * Codeception will not notice it.
+     * As a more professional alternative, we recommend Mailpit, wchich also lets you test the content of the mail.
      *
      * ```php
      * <?php