Ability to specify different email gateways to use for different purposes

rcheesley · October 23, 2025, 3:19pm

In case folks land here looking for an update, there’s a PR merged in Mautic 7 which could set the foundations for this becoming a UI feature:

github.com/mautic/mautic

Use long-form to define mautic main mailer DSN

7.x ← rodrigoaguilera:patch-1

opened 07:54AM - 26 Aug 25 UTC

rodrigoaguilera

+3 -1

See https://symfony.com/doc/current/mailer.html#multiple-email-transports |… Issue(s) addressed | Not sure if a separate issues need to be created ## Description I'm developing plugin that should allow for multiple mailer transports and I would like to follow symfony's mechanism to do so. https://symfony.com/doc/current/mailer.html#multiple-email-transports I can modify the configuration of the `framework` bundle by using a prepend in my own plugin/extension https://symfony.com/doc/current/bundles/prepend_extension.html but I face an error from symfony that I can't define both `transports` and `dsn` for mailer. My proposal is to change to the long form of defining the mailer configuration so extensions have the chance to add more transports. With the current definition it limits extensibility. --- ### 📋 Steps to test this PR: Create a new plugin with the following `DependencyInjection/MultiSMTPRoutingExtension.php` file ```php <?php namespace MauticPlugin\MultiSMTPRoutingBundle\DependencyInjection; use Symfony\Component\Config\FileLocator; use Symfony\Component\DependencyInjection\ContainerBuilder; use Symfony\Component\DependencyInjection\Extension\Extension; use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface; use Symfony\Component\DependencyInjection\Loader\PhpFileLoader; class MultiSMTPRoutingExtension extends Extension implements PrependExtensionInterface { /** * @param mixed[] $configs */ public function load(array $configs, ContainerBuilder $container): void { $loader = new PhpFileLoader($container, new FileLocator(__DIR__.'/../Config')); $loader->load('services.php'); } public function prepend(ContainerBuilder $container): void { $container->prependExtensionConfig('framework', [ 'mailer' => [ 'transports' => [ 'alternative' => 'smtp://mailpit:1025' ], ], ]); } } ``` With Mautic core without this PR it throws an error but with the change proposed it allows to have an additional `alternative` transport.

See the comment here:

Topic		Replies	Views
Multiple SMTP settings for different mailing segments General Discussion	31	4748	February 5, 2025
Mautic Plugin - Each User Different Email (SMTP) settings Development	2	1729	September 4, 2017
Multiple email settings Development	7	1468	February 2, 2020
Ability to add multiple SMTP providers Ideas and Feature Requests	30	3397	April 11, 2025
Send email Product Support	28	1705	February 2, 2020

Ability to specify different email gateways to use for different purposes

Related topics