diff --git a/pkg/ddevapp/drupal/drupal/settings.ddev.php b/pkg/ddevapp/drupal/drupal/settings.ddev.php
index 86346eaaeae..4dcfda7937e 100644
--- a/pkg/ddevapp/drupal/drupal/settings.ddev.php
+++ b/pkg/ddevapp/drupal/drupal/settings.ddev.php
@@ -39,6 +39,7 @@
 }
 
 // Override drupal/symfony_mailer default config to use Mailpit.
+$config['symfony_mailer.settings']['default_transport'] = 'sendmail';
 $config['symfony_mailer.mailer_transport.sendmail']['plugin'] = 'smtp';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['user'] = '';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['pass'] = '';
diff --git a/pkg/ddevapp/drupal/drupal10/settings.ddev.php b/pkg/ddevapp/drupal/drupal10/settings.ddev.php
index 86346eaaeae..4dcfda7937e 100644
--- a/pkg/ddevapp/drupal/drupal10/settings.ddev.php
+++ b/pkg/ddevapp/drupal/drupal10/settings.ddev.php
@@ -39,6 +39,7 @@
 }
 
 // Override drupal/symfony_mailer default config to use Mailpit.
+$config['symfony_mailer.settings']['default_transport'] = 'sendmail';
 $config['symfony_mailer.mailer_transport.sendmail']['plugin'] = 'smtp';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['user'] = '';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['pass'] = '';
diff --git a/pkg/ddevapp/drupal/drupal11/settings.ddev.php b/pkg/ddevapp/drupal/drupal11/settings.ddev.php
index 86346eaaeae..4dcfda7937e 100644
--- a/pkg/ddevapp/drupal/drupal11/settings.ddev.php
+++ b/pkg/ddevapp/drupal/drupal11/settings.ddev.php
@@ -39,6 +39,7 @@
 }
 
 // Override drupal/symfony_mailer default config to use Mailpit.
+$config['symfony_mailer.settings']['default_transport'] = 'sendmail';
 $config['symfony_mailer.mailer_transport.sendmail']['plugin'] = 'smtp';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['user'] = '';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['pass'] = '';
diff --git a/pkg/ddevapp/drupal/drupal9/settings.ddev.php b/pkg/ddevapp/drupal/drupal9/settings.ddev.php
index 24aecfc39e3..d3f0cf07212 100644
--- a/pkg/ddevapp/drupal/drupal9/settings.ddev.php
+++ b/pkg/ddevapp/drupal/drupal9/settings.ddev.php
@@ -39,6 +39,7 @@
 }
 
 // Override drupal/symfony_mailer default config to use Mailpit.
+$config['symfony_mailer.settings']['default_transport'] = 'sendmail';
 $config['symfony_mailer.mailer_transport.sendmail']['plugin'] = 'smtp';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['user'] = '';
 $config['symfony_mailer.mailer_transport.sendmail']['configuration']['pass'] = '';