I am testing MEG in my testing environment and below is my setup
192.168.5.155 DNS Server
mail.isn.net is relaying mail to test.net using mx & mail.test.net is sending mail to mail.isn.net using MX lookup. Every appliance has DNS configured as 192.168.5.155 and proper record exists.
Mail flow is perfectly fine until I start Recipient verification. I have setup LDAP query and wanted to block unknown emails or email harvesting. This i creating an issue as soon as I enable that setting and mail gets bounced with 550 error.
Then I tweaked protocol presets as I came to know recipient verification applies globally and wanted to enable only for incoming mails. But somehow I am missing as mails from isn.net to test.net is continuously getting blocked. And when I disable the setting mail goes fine.
Any clue what I am missing here?
If the sender server's IP address is not in a protocol preset with recip auth disabled, it will get blocked. are email addresses going to test.net able to be pulled in on an LDAP query? have you tested this in the GUI to make sure that the LDAP server is returning the correct response?