On 11/02/24 13:51, Doug Hardie via Postfix-users wrote:
If I am understanding correctly, that means that if I set smtp_skip_5xx_greeting to "no", then postfix would stop after the first 5xx and terminate the email. That seems like it might open up some issues where a provider with multiple MTAs might have one in problem state, but the others working fine. If postfix tried the problem MTA first, the email would never get delivered.
Right, and further to that a 554 response at connection time is a rejection of the *connection*. No attempt was ever made to send the *message*, so in a manner of speaking the message is still valid and a different connection might accept it (e.g. by attempting a different MX). An MTA that wants to reject the message should should wait until after the RCPT TO command to reject the actual message.
Peter _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
