Thus said Michael Torrie on Tue, 17 Jul 2007 23:22:56 MDT: > Switch to a different greylisting daemon. If mail is being delayed for > 24 hours, then you're doing something wrong. I delay for a minimum of > 20 minutes and I've never had messages delayed more than 30 minutes.
Not necessarily. There are hundreds, if not thousands, of poorly configured mail servers. I've been running greylisting since it first came out and this is the number one problem. I have seen dozens of servers that attempt a single delivery that will bounce on a temporary failure (4xx level error). I have seen hundreds of servers that don't attempt delivery again for over 6 hours and a few that attempt after 24 hours. Most problems with greylisting are on the sender side, mostly due to misconfiguration, and often due to bad MTA software. Another big problem are big email systems that use a load balanced outgoing mail queue (gmail being the most widely known). Greylisting can cause major headaches when receiving emails from a domain that switches mail servers each time it trys a redelivery. Andy -- [-----------[system uptime]--------------------------------------------] 10:14pm up 3:34, 1 user, load average: 1.05, 1.11, 1.17 /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
