Hi, I’ve set up my new mailcow server using Sendgrid as an SMTP relay for all Google domains (transport maps in system config –> routing).
.*google\.com smtp.sendgrid.net:587 apikey
This works great, but I need to add an extra fallback SMTP option when this SMTP relay fails (e.g. when I add a new domain but forget to verify that domain in Sendgrid). I just want the fallback to be Mailcow’s regular SMTP.
I’m trying to set up a transport map to do this, but I can’t seem to get it to work. I’ve been trying things like this:
.*google\.com smtp.sendgrid.net:587, localhost apikey
Is this possible in the Mailcow GUI, or will I need to do some meddling into the postfix config files? And in that case, does anyone have any pointers for me?