[Dovecot] PATCH: Deliver looses mail and DSN if Return-Path is missing

[Steffen Kaiser]

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On Wed, 9 May 2007, Timo Sirainen wrote:

> Oh, right, return_address = NULL also if the address isn't valid. In
> those cases I think it should return 0, because there just isn't
> anything to be done. So EX_TEMPFAIL should only be returned if the whole
> Return-Path: is missing I think.

I don't. Some Postmasters may want to inspect failed DSNs and have set the 
MTA to do something with bounces. When you return "0" here, the MTA 
believes that the delivery is _successful_ although it is not. Hence, both 
the mail and the DSN is lost.

BTW: Would it be possible to return the errno of the failed system call to 
the MTA via the main() return value? I believe that any MTA will act upon 
these codes and the postmaster can setup the preferred way handling 
bounces.

Bye,

- -- 
Steffen Kaiser
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