How to define custom mailtransport

[jeff1985]

I'm trying to write a custom mail transport but it seems that this is not possible in the newer versions of this bundle.

When I try to define it in the config like this:

swiftmailer:
    url: '%env(MAILER_URL)%'
    spool: { type: 'memory' }
    transport: 'queue'

and in services.yaml

swiftmailer.mailer.transport.queue:
      class: App\Email\EmailQueueTransport

I see:

In SwiftmailerTransportFactory.php line 71:

  Not a built-in Swiftmailer transport: queue.

If found this issue, #298 which is similar but has been closed because of reference to other library. Also I found a similar issue in mailjet/MailjetSwiftMailer#24
It is similar to my case, however I have my own transport implementation, which I try to configure.

Is it generally possible to configure custom mailtransport with this bundle? And if so, is there any documentation about this?

[OskarStark]

Hi Jeff,

am I allowed to ask which transport do you want to implement? Did you checked symfony/mailer instead of SwiftMailer? It is the newer mailer approach we use in Symfony and it also has a lot of working transports on Board 👍🏻