1
I have searched for answers to this question for some times now and I can't find any precise answer so I think it is good to ask it here:
How long will Postfix try to resend email to an unavailable server (for example a server which is off-line or there is no route to it)? And how can I change it?
asdasdgg
Posted 2016-09-06T15:57:13.313
Reputation: 11
0
Postfix uses the maximal_queue_lifetime configuration option to determine how long a message can stay in the queue and attempt delivery. It defaults to 5 days, but you can certainly change it.
The relevant standard, RFC 5321, in section 4.5.4.1, has this to say:
Retries continue until the message is transmitted or the sender gives up; the give-up time generally needs to be at least 4-5 days. It MAY be appropriate to set a shorter maximum number of retries for non- delivery notifications and equivalent error messages than for standard messages. The parameters to the retry algorithm MUST be configurable.
That's presumably the source of defaulting to 5 days.
1
Maximum queue lifetime seems to default to only 5 days (assuming I read this correctly: http://www.linuxtopia.org/online_books/mail_systems/postfix_documentation/TUNING_README_008.html). That seems rather short though. I am used to retreies up to 6 weeks.
– Hennes – 2016-09-06T16:01:43.173