>I have clients that host their own mailboxes on systems that connect as >needed to send/receive mail. > >What happens when messages arrive at my imgate and their system is not >online to verify the recipient address?
rejected with 4xx as not verifiable (the MX for recipient.domain not responding) >I read the docs on address probe delivery but don't grasp the actual >parameters needed to override the tranport.map on a domain by domain basis. there's no need to override anything, postfix will resolve the MX for @recipient.domain using its usual resolution approach Len
