On Wed, Apr 22, 2009 at 11:57:27AM -0400, [email protected] wrote:
> My users NDR's are not arriving until the 5 day retry period has lapsed,
http://tools.ietf.org/html/rfc5321#section-4.5.4.1
> creating issues whereby time critical emails are not getting out due to
> their unawareness of this matter.
The customer has somewhat unrealistic expectations of email as an
instant-messaging protocol. This said, retry times of ~2 days are not
unreasonable. However, lowering this to hours or minutes is not.
> Here is some of my postconf output, hopefully the important/relevant parts:
Don't make random configuration changes when you don't know what you
are doing. Undo *all* the changes you made. They having to do with
error handling in outgoing mail...
> unknown_hostname_reject_code = 550
> unknown_local_recipient_reject_code = 450
Set this one to 550, to help remote senders not needlessly retry
undeliverable mail they are sending to you.
> unknown_relay_recipient_reject_code = 550
> unknown_virtual_alias_reject_code = 550
> unknown_virtual_mailbox_reject_code = 550
> Anything I must change here in order for outbound email to get quick NDR's?
# Do not set lower!
maximal_queue_lifetime = 2d
--
Viktor.
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