Thanks for the reply. See embedded comments. Also note that all messages go through the same destination server.
On 1/18/2018 2:55 PM, Viktor Dukhovni wrote: > >> On Jan 18, 2018, at 2:44 PM, Dennis Putnam <d...@bellsouth.net> wrote: >> >> I occasionally encounter a strange problem with the mail queue seemingly >> not retrying failed messages. > What is your definition of "not retrying"? Messages are retried > periodically, with exponential backoff up to the maximal_backoff_time. > When enough messages for a given destination all encounter connection > failure, other messages in the active queue to the same destination > may be deferred without being retried (to avoid queue congestion). Since they go immediately when I run postqueue -f I assumed they were not really being retried. > >> The messages show in mailq as having timed >> out and are a few days old. > They've probably maxed out the maximal_backoff_time and are tried > infrequently, but are not forgotten. The default is 4000 seconds according to the docs. Since I don't specifically set it in main.cf that is a little over an hour. In the 2-3 days they have been sitting in the queue there should have been numerous retries. During which time other message were going through. Why did they not time out as well? It is too coincidental that the destination server times out every time just those messages are retried while others do not. > >> In the mean time other messages are going through just fine. > That's normal. I wouldn't think so if the maximal_backoff_time has expired many times during that period. > >> As soon as I run postqueue -f those messages go through as well. > That's also normal. Again, it is too coincidental to believe that they suddenly don't time out when postqueue -f is run after all those days of retries. > >> I guess I can set up a cron to issue the postqueue -f command > Don't. I don't want to but I need to keep these messages moving. > >> but there is obviously something wrong. > Nothing in your message is evidence of of a problem. Other than the messages do not get sent until I run postqueue -f. > >> Can someone tell me how I might trouble shoot this problem? > First post evidence of a problem (logs and configuration details). > Nothing of note in the logs ever shows up. All the retry timeout config stuff is default. I don't set any of that in main.cf.
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