diff --git a/web/sites/default/settings.platformsh.php b/web/sites/default/settings.platformsh.php
index e80914a..699c6e5 100644
--- a/web/sites/default/settings.platformsh.php
+++ b/web/sites/default/settings.platformsh.php
@@ -163,3 +163,12 @@
       break;
   }
 }
+
+// Drupal Symfony Mailer (contrib)
+// Platform.sh provides msmtp to intercept sendmail emails and forward them to
+// Sendgrid. Since the msmtp doesn't work with the default -bs sendmail option,
+// you should use the custom command ini_get('sendmail_path').
+// @see: https://www.drupal.org/docs/contributed-modules/drupal-symfony-mailer/getting-started#s-platformsh
+$settings['mailer_sendmail_commands'] = [
+  ini_get('sendmail_path'),
+];