Raise Postfix Email Retention Policy

       83 words, 1 minutes

When you host a secondary MX server and the primary SMTP is out of order for more than 5 days, you will start to loose e-mail from the MX backup. There is a (temporary) easy way to deal with this: raise the retention time of the Postfix mail queue. Edit postfix/, add maximal_queue_lifetime = 30d and reload Postfix. You’re done! Keep an eye on the mail queue while the primary MX is down.

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