Do out-of-office replies get sent to the return-path header?

Posted by Brian Armstrong on Server Fault See other posts from Server Fault or by Brian Armstrong
Published on 2010-03-30T05:59:16Z Indexed on 2010/03/30 6:03 UTC
Read the original article Hit count: 402

Filed under:

return-path

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email-bounces

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tracking-bounces

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postfix

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out-of-office

I always thought that the return-path header was used for bounced messages, so I have my email newsletter software setup to unsubscribe anyone whose email address replies back to the return-path email address.

But recently some users started telling me their out-of-office replies where unsubscribing them. Do out-of-office replies get sent to the return-path on some email servers?

I could check all emails to that address and see if they have the "message/delivery-status" content-type in one of the parts, but I wasn't sure if this was necessary.

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