mendozal in short? not definitively. the initial reason why i've created the destintation@email-on-google.tld mailbox on the enhance server was the deliverability issue. but the forwarder was there before that, since the website was imported from plesk where it was originally set up years ago.
But between importing the site and setting up the mailbox i've changed many settings trying to debug what's happening, so i can only assume that it was the forwarder.
Now if i re-add the forwarder, the postmap test doesn't give back anything.
If i re-add the mailbox that exists on google, the mailbox shows up in the postmap test.
BUT
If i send a test mail from a domain inside enhance to the mail address in question, it gets delivered to google. 😃
Edge case lvl 100.
