Rodrigo Severo writes:
Sam Varshavchik wrote:Rodrigo Severo writes:If there are multiple primary MXs set, Courier should already pick one at random with each delivery attempt.Sam, are you saying that two consecutive delivery attempts by Courier will try to deliver the message to two different MXs, no matter the cause of the first failure (4xx error, connection time out during smtp conversation, no connection at all, etc) ?No, I'm saying that with each delivery attempt, when multiple primary MXs are present with equal priority, one of the MXs will be chosen at random.No matter the cause of the first temporary failure?
No matter.There is one marginal exception. If the initial connection fails to go through to ALL the MXes, Courier will stop all further attempts to deliver a message to the same domain for several minutes. It's likely that the multiple connection attempts took a long while to time out, so rather than sit with a thumb up your ass for five minutes for each message in the mail queue, plugging up the whole works and backing up all mail deliveries for everyone, Courier will ignore all mail to this domain for several minutes, in order to flush out any backlog.
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