On Fri, 23 May 2008, Richard Frovarp wrote:

Marcin Praczko wrote:

 BUT if message is not SPAM - and user doesn't exist, bounce message
 should be send to sender.

Do not bounce! If the user does not exist, reject the message at SMTP time. Problem solved. If you accept the message, it is up to you to deal with it. Bouncing will just send messages back to people who don't deserve it. Look up "joe jobbed".

In addition, behavior like that can get you blacklisted.

Marcin, please do not accept-then-bounce mail sent to nonexistent users or mail blocked for spamminess. You may find it increasingly difficult to communicate with the rest of the world, and you _will_ be hated.

--
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