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Ok, I have 2 mail servers. The priority 10 that recieves email is dead right now. It's 100 miles away so I can't look at it.
So my priority 20 server is obviously filling up with mail in the mail queue. I want to know where the settings is to know how long it will hold onto mail before giving up and bouncing the message back. Anybody know what setting that is in regaurd to transport maps?
the value for mesage timeouts is controlled by the "maximal_queue_lifetime" parameter. this defaults to 5 days. after this time, it's returned as undeliverable. there are other things which might be relevant in your situation though, such as restirctions on the maximum number of queued mails per user, but unless it's very very busy, you won't touch it.
crap, that took aaages to find this out.. no idea why i found it so tricky....