Is null return path reliable indication of a bounce?

Posted by Vasiliy Faronov on Server Fault See other posts from Server Fault or by Vasiliy Faronov
Published on 2012-10-11T08:08:42Z Indexed on 2012/10/11 9:40 UTC
Read the original article Hit count: 278

Filed under:

email

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smtp

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email-bounces

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mta

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filter

I have a mailbox that receives bounces as well as normal email (the latter includes messages from automated services). I want to filter out the bounces and forward them to another mailbox. Assume I cannot change the envelope return path in email I send.

Is “null return path” a reliable criterion to tell bounces from normal mail? Roughly how many false positives and false negatives can I expect if I apply it?

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