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How can I change how long undeliverable messages stay in the queue? |
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By default, a message that is not deliverable will stay in the Postfix queue for 5 days with the sender not being notfied at all during this time.
Such a setting may have been useful in the days the internet wasn't as reliable as it is today, but hardly makes sense anymore.
To change this, edit /etc/postfix/main.cf and add or alter the following parameters:
maximal_queue_lifetime = 2d
delay_warning_time = 6h
This will reduce the maximum time a message stays in the queue to 2 days, while at the same time, notifying the sender of the delay after 6 hours.
When done issue:
sudo postfix reload
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