efa-project.org

Hello, I understand that to enable DSNs, it's suggested to configure the MSMail Delivery Method to SMTP. Could someone share if there are any disadvantages or potential issues with switching from QMQP to SMTP?

I'm not sure how the choice of SMTP and QMQP has anything to do with DSNs...

If you switch to SMTP for the milter, make sure you set , otherwise you'll end up with a mail loop. Any mail from localhost on the eFa will bypass filtering and won't show up in MailWatch.

Oh you are right, DSN options do get passed along when using SMTP instead of QMQP.