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How do i re-route an incoming email address to a our domain using postfix.The mail should not go to spam mail. The sender should get a failure sending message. Can anyone please help me to it.

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So, you want to bounce the message but still take a copy of it? WHY? –  womble Jul 11 '09 at 9:19
    
Somethings's not right here...womble's right(+1), the only reason I can think to use this arrangement is to track responses to email addresses. Can you elaborate a bit as to why you want your email server to be fundimentally broken? –  Avery Payne Jul 11 '09 at 19:21
    
Trying out an experiment. –  Caterpillar Jul 15 '09 at 4:06
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1 Answer

up vote 0 down vote accepted

http://www.postfix.org/pipe.8.html says:

   Postfix  version  2.3  and  later  support  RFC 3463-style
   enhanced status codes.  If a  command  terminates  with  a
   non-zero  exit  status, and the command output begins with
   an enhanced status code, this status code takes precedence
   over the non-zero exit status.

So if you pipe the addreses you want to return fmilures for over to a command and then 1) output an enhanced status code from RFC3463 and then 2) return a non-zero exit code, the sender will get the enhanced status code that you sent.

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