Steve Jenkins:
> qshape isn't showing deferred mail on mailer1, though. qshape deferred is
> all zeros. The active queue is massive, however (over 91K messages in it
> now) and more than half of them are in the 1280 column.
>
> When a destination replies to mailer1 like this:
>
> Jan 16 16:10:15 mailer1 postfix-aol/smtp[1744]: 41C4F4F6F7D: host
> mailin-04.mx.aol.com[64.12.90.34] refused to talk to me: 554
> mtain-mh04.r1000.mx.aol.com ESMTP not accepting connections
>
> Should that not trigger handing the message over to the fallback relay for
> subsequent attempts?
With "smtp_skip_5xx_greeting = yes" by default, Postfix pretends
that the session failed due to a temporary error and tries the next
MX host (or fall-back relay).
If the mail is still in the active queue then Postfix is still
trying other hosts.
grep '41C4F4F6F7D' will show some of the delivery history, but
you will need grep 'smtp.1744' for details.
Wietse
