When active recipient verification, PMG sends a double-bounce email to the recipient.
I'm getting the errors:
My email server requires me to be logged in and authenticated beforehand.
How can I make the "double-bounce" email authenticated before sending?
Hello,
I use proxmox mail gateway as a relay server. The final mail server is a postfix server. I enabled the verify receivers and set it to Yes (550) on PMG.
I tested with some test e-mail:
550 5.1.1 <unknown@mydomain.de>: Recipient address rejected: undeliverable address: Recipient address...
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