Re: Postifix 2.11.3 sends some mails (not spam) to postmater@

[Josef Karliak]

  Hi,
  I found that only emails with "dmarc=fail" in the headers are sent to
postmaster - as it is defined in our dmarc record, but that should be
statistics, not emails...
  Thanks and best resgards
  J.K.



> Josef Karliak:
>>   Good morning,
>>   Postfix copy some mails (not spams) to postmaster@ email of our
>> domain,
>> what could cause it ? But only some mails.
>
> The Postfix SMTP server always accepts mail for "postmaster".
> That was added in Postfix 1.1.0.
>
> /*
>  * XXX 2821: Section 3.6 requires that "postmaster" be accepted even
> when
>  * specified without a fully qualified domain name.
>  */
> if (strcasecmp(recipient, "postmaster") == 0)
> return (0);
>
> This has not changed in the past 14 years.
>
> The usual Postfix rules will apply for postmaster@domainname.
>
>   Wietse
>


-- 
Ma domena pouziva zabezpeceni a kontrolu SPF (www.openspf.org) a
DomainKeys/DKIM (s ADSP) a implementaci DMARC. Pokud mate problemy s
dorucenim emailu, zacnete pouzivat metody overeni puvody emailu
zminene vyse. Dekuji.
My domain use SPF (www.openspf.org) and DomainKeys/DKIM (with ADSP)
policy and implementation of the DMARC. If you've problem with sending
emails to me, start using email origin methods mentioned above. Thank
you.

Re: Postifix 2.11.3 sends some mails (not spam) to postmater@

[Wietse Venema]

Josef Karliak:
>   Good morning,
>   Postfix copy some mails (not spams) to postmaster@ email of our domain,
> what could cause it ? But only some mails.

The Postfix SMTP server always accepts mail for "postmaster".
That was added in Postfix 1.1.0.

/*
 * XXX 2821: Section 3.6 requires that "postmaster" be accepted even when
 * specified without a fully qualified domain name.
 */
if (strcasecmp(recipient, "postmaster") == 0)
return (0);

This has not changed in the past 14 years.

The usual Postfix rules will apply for postmaster@domainname.

Wietse

Re: Postifix 2.11.3 sends some mails (not spam) to postmater@

[Wietse Venema]

Josef Karliak:
>   Hi,
>   I found that only emails with "dmarc=fail" in the headers are sent to
> postmaster - as it is defined in our dmarc record, but that should be
> statistics, not emails...

With Postfix, DMARC is implemented by Milters or content filters.
Postfix itself is DMARC-agnostic.

Wietse

Postifix 2.11.3 sends some mails (not spam) to postmater@

[Josef Karliak]

  Good morning,
  Postfix copy some mails (not spams) to postmaster@ email of our domain,
what could cause it ? But only some mails.
  One idea -
  "postmaster" file contains :
postmaster@ OK
abuse@  OK

  This is new after reconfiguration to incoming MX server. But this file
is also on old MX server and there were not this isues. There were
postfix 2.9.6


  Thanks and best regards
  J.Karliak

-- 
Ma domena pouziva zabezpeceni a kontrolu SPF (www.openspf.org) a
DomainKeys/DKIM (s ADSP) a implementaci DMARC. Pokud mate problemy s
dorucenim emailu, zacnete pouzivat metody overeni puvody emailu
zminene vyse. Dekuji.
My domain use SPF (www.openspf.org) and DomainKeys/DKIM (with ADSP)
policy and implementation of the DMARC. If you've problem with sending
emails to me, start using email origin methods mentioned above. Thank
you.

Re: Postifix 2.11.3 sends some mails (not spam) to postmater@

[Juri Haberland]

Josef Karliak wrote:
>   Hi,
>   I found that only emails with "dmarc=fail" in the headers are sent to
> postmaster - as it is defined in our dmarc record, but that should be
> statistics, not emails...

Maybe you have "CopyFailuresTo" set in your opendmarc.conf?

-- 
  Juri

Re: Postifix 2.11.3 sends some mails (not spam) to postmater@

[Christian Kivalo]

Am 17. März 2016 14:34:32 MEZ, schrieb Josef Karliak :
>  Hi,
>  I found that only emails with "dmarc=fail" in the headers are sent to
>postmaster - as it is defined in our dmarc record, but that should be
>statistics, not emails...
>  Thanks and best resgards
>  J.K.

Do they dmarc fail at your server when you receive them or are these mails 
received from external source? Headers showing your findings would help.

You specified a ruf= recipient address and that reqests forensic reports when 
Mails dmarc fail. How much content you receive for failed messages depends 
mostly on settings in the checking server.

-- 
Christian

Re: Postifix 2.11.3 sends some mails (not spam) to postmater@

[Josef Karliak]

  Yes,
  I use dmarc milter for postfix, opendmarc.
  J.K.



> Josef Karliak:
>>   Hi,
>>   I found that only emails with "dmarc=fail" in the headers are sent to
>> postmaster - as it is defined in our dmarc record, but that should be
>> statistics, not emails...
>
> With Postfix, DMARC is implemented by Milters or content filters.
> Postfix itself is DMARC-agnostic.
>
>   Wietse
>


-- 
Ma domena pouziva zabezpeceni a kontrolu SPF (www.openspf.org) a
DomainKeys/DKIM (s ADSP) a implementaci DMARC. Pokud mate problemy s
dorucenim emailu, zacnete pouzivat metody overeni puvody emailu
zminene vyse. Dekuji.
My domain use SPF (www.openspf.org) and DomainKeys/DKIM (with ADSP)
policy and implementation of the DMARC. If you've problem with sending
emails to me, start using email origin methods mentioned above. Thank
you.