On Mon, Aug 11, 2014 at 02:01:46PM -0400, Miles Fidelman wrote: > If a machine crashes while postfix is processing a message - but the disks > are not corrupted - what happens to the message being processed?
Messages that Postfix accepted responsibility for (accepted into its queue) are not lost. Delivery will be attempted as the queue is processed. > - lost No. > - sent properly Postfix does not send messages "improperly". > - potentially get sent twice? Messages can get sent twice when systems crash at the wrong moment. That's unavoidable. First the remote server accepts the message, then the local server marks the recipient(s) done. A crash between the two events will lead to duplicate deliveries. Duplicate delivery is still "proper delivery". -- Viktor.