[Dovecot] RFE: please add Return-Path: to sieve sent mail headers

[Robert Schetterer]

Am 16.05.2014 21:03, schrieb Oscar del Rio:
> On 05/13/14 03:02 PM, Stephan Bosch wrote:
>>
>> Use of NULL envelope sender is generally recommended to prevent mail
>> loops
> 
> Unfortunately, many servers out there reject emails with NULL sender.
> Some recent examples (real server names edited) :
> 
> ... while talking to antispam1.*.ca.:
>  >>> DATA
>  <<< 550 Empty envelope senders not allowed
> 
> ... while talking to smtp.*.net.:
>  >>> MAIL From:<> SIZE=1096
>  <<< 550 5.1.0 <> Blank From: addresses are not allowed. Please provide
> a valid From: IB501 <http://x.co/srbounce>
> 
> ... while talking to spam.*.edu.cn.:
>  >>> DATA
>  <<< 553 Requested action not taken: NULL sender is not allowed
> 
> ... while talking to mail.*.co.kr.:
>  >>> MAIL From:<>
>  <<< 501 bad sender address expression.
> 
> ... while talking to antispam.*.com.:
>  >>> MAIL From:<>
>  <<< 501 Syntax error in address


you will find any kind of bad config in www if you search for it

http://www.postfix.org/postconf.5.html

...
Beware, some sites reject mail from <>, even though RFCs require that
such addresses be accepted.
...


Best Regards
MfG Robert Schetterer

-- 
[*] sys4 AG

http://sys4.de, +49 (89) 30 90 46 64
Franziskanerstraße 15, 81669 München

Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263
Vorstand: Patrick Ben Koetter, Marc Schiffbauer
Aufsichtsratsvorsitzender: Florian Kirstein