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Old 01-27-2008, 10:55 PM   #1
Registered: Mar 2005
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How to disable NDR in postfix

Dear all,
I got a problem where my mail-relay (postfix) has received a lot of SPAM and it has been blocked by spamassassin. But My postfix was sent a NDR to a non existence sender / spammer. Therefore how could i disable this NDR to overcome the problem.

Old 01-28-2008, 04:59 PM   #2
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Configure Postfix to not accept that mail in the first place.. if the server drops it due to missing host or MX records or lack of rDNS configuration then that's one less email to process. should cut down on replying to invalid emails quite a bit.

That will take a bit of load off spamassassin, since it will then have less email to churn through.

possibly reject_unknown_sender_domain


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