Platform.sh email sending with Symfony

Question

I'm trying to send emails from my Symfony 3 project at Platform.sh.

I followed this documentation: https://docs.platform.sh/administration/web/email.html

My parameters.yml:

mailer_transport: sendmail
mailer_host: null
mailer_user: null
mailer_password: null
mailer_port: 465
mailer_encryption: tls

I use swiftmailer with memory spooling. Swiftmailer's send() method returns true, but it seems like it doesn't relly send any emails.

In the settings, outgoing emails are ON for Master.

Do I need to set any system variables, or what am I missing?

Answer 1

Using the Drupal Symfony Mailer module on a Drupal 9 or 10 website I had to override the sendmail transport command to use the -t option instead of the default -bs. Note that Sendmail documentation recommends using the -i or -oi options any time you use the -t option.

// sites/default/settings.platformsh.php

// Required for Sendgrid (via msmtp intercept from sendmail) on Platform.sh.
$config['symfony_mailer.mailer_transport.sendmail']['configuration']['query']['command'] = ini_get('sendmail_path') . ' -t -i';

For the (now deprecated) SwiftMailer for Drupal 8/9, you must set the transport_mode to 't' instead of 'bs'

# swiftmailer.transport.yml
sendmail_mode: 't'

Another possibility is to use platformsh environment variables.

d8config:swiftmailer.transport:sendmail_mode and set its value to 't'

Hopefully it could help you on Symfony too.