I have emails that accumulate in the Postfix deferred queue with messages like:
* (connect to comcat.net[216.3.71.208]:25: No route to host) * (connect to schollnet.com[208.73.210.27]:25: Connection refused) * (Host or domain name not found. Name service error for name=oasis.org.autype=MX: Host not found, try again) * (connect to a34-mta04.direcpc.com[66.82.4.105]:25: Operation timed out) These examples above are just a snapshot of the type of error messages I see in the deferred queue- I'm not asking for specific information about these messages. The error messages all make sense as to what happened or what's not configured correctly on the receiving end. I know Postfix will try to deliver them again at increasing intervals (as configured). How long will that retry process go on? Will they eventually be moved into the hold queue? Will they ever actually bounce back to the SMTP MAIL FROM (return-path) sender? I know how to clean them out and I even wrote a little script to help me with that, but I couldn't find a lot of detailed documentation that described what would happen in these types of undeliverable cases. Thanks! Clint
