So, you send a lot of mails to XYZ Consulting? I'm sure that their xyz.com domain can't be causing that many issues? Or were you just using that as a generic example? If so, example.com is traditionally used for such uses.

Regarding the hard bounces, a hard bounce is when a mail is bounced because of an issue with the recipient's mailbox, over quota, no longer exists, etc. You would like Postfix to hold up mail to that server, for any other user, because ONE user's mailbox had an error? Is that really what you are trying to accomplish?

A soft bounce happens when there is a mail server issue, as opposed to an individual account. Postfix will be able to tell the difference. More info on what I think you are looking for can be found here: http://www.postfix.org/rate.html#backoff

The default values tend to work just fine What you are asking for in your mail is exactly what Postfix does, it will hold mails for a problem domain, and retry at increasingly longer intervals until delivery is accomplished, or until maximal_queue_lifetime (default 5 days) have elapsed.

If there is something specific that you're trying to fix, please detail exactly what you are trying to solve.


On Mar 23, 2009, at 11:58 PM, Ashwin Muni wrote:

I get around "HARD Bounces" for huge no. of domain from my environment every day. I want postfix to record these types of domain and use as reference for later sending of mail. When a mail comes if the domain is present in the list then it should not try sending instead defer it or send an notification.

say i send a mail to xyz.com and it got bounced i want postfix not to try sent mail to this domain for a specific time.


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