Wed, 06 Sep 2006
Deferring Postfix delivery
Sometimes it's handy to have your gateway email server accept all messages but not deliver them out. I sometimes need this when testing that a big mail out to clients isn't going to have embarrassing consequences.
If you're using Postfix this is easy; use the defer_transports setting. To hold all mail use
defer_transports = smtp
in main.cf.
To trigger delivery use sendmail -q. Very useful.