Sieve "redirect" changes envelope sender in 2.3. / pigeonhole 0.5

[Steffen Kaiser]

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On Fri, 20 Apr 2018, Olaf Hopp wrote:
> On 04/20/2018 02:53 PM, Olaf Hopp wrote:
>> On 04/20/2018 02:01 PM, Olaf Hopp wrote:
>>> Hi (Stephan?),
>>> is it a new feature of dovecot 2.3 /pigeonhole 0.5 that a sieve "redirect" 
>>> changes the envelope sender of
>>> a redirected mail or simply a bug ?
>>> 
>>> A sends mail to B, B redirects to C
>>> C sees B (not A!) as envelope sender.
>>> It is not a problem if C gets the mail but if that mail bounces
>>> for various reasons it goes back to B and A will never know about this.

That's just one problem these days.

>> Envelope *senders* should never ever be modified.

If the domain of sender A has SPF records installed and B redirects to C, 
but keeps the envelope sender A, the SPF check will fail on C.

Looks like any redirect has potential to fail, unless to establish some 
sort of SRS as well.

- -- 
Steffen Kaiser
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