I vaguely remember discussing this, but don't remember if anything conclusive was reached. I'm trying to hack together a VERP system (send emails with unique return-path so I can see which messages were undeliverable), and the challenge I have is the exact error message is buried deep in the message.

I know I can't address whether another server sends me a bounce, but what about doing something like stick the error response as a header in the bounce message? That way for most bounces (that are generated internally), I'll be able to easily retrieve the most pertinent data.

The motivation for this is to recognize soft bounces (mailbox full, mail servers down) from hard bounces (mailbox does not exist, invalid domain name, etc...)

--
Serge Knystautas
President
Lokitech >> software . strategy . design >> http://www.lokitech.com/
p. 1.301.656.5501
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