dovecot - Feb 2019 - offtopic: rant about thoughtless enabling DMARC checks

On 10/02/2019 07:38, Ralph Seichter via dovecot wrote:
> * Juri Haberland via dovecot:
> 
>> Blindly enabling DMARC checks without thinking about the consequences
>> for themselves should not be the problem of other well behaving
>> participants.
> 
> Can you judge if DMARC is enabled "blindly"? No, I thought not.
Also,
> the issue was not on the receiving end, but the reject policy for the
> originating domain.
> 
> Personally, I choose to treat "reject" as if it was
"quarantine",
> i.e. affected mail is rerouted to a specific folder.
> 
>> And Aki, please go back to "munge only if needed" - munging
all
>> messages leads to a really bad "user experience".
> 
> Only speak for yourself please.
> 
> -Ralph
+1 (for entire post) 

... and surely he does not expect those with a million plus users sit
here and whitelist the million plus mailing lists that exist around the
world, heh, like thats going to happen :) 

-- 
Kind Regards, 

Noel Butler 

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Noel Butler via dovecot skrev den 2019-02-10 01:51:
> ... and surely he does not expect those with a million plus users sit
> here and whitelist the million plus mailing lists that exist around
> the world, heh, like thats going to happen :)
fixing mailman will be the fail, solve it by letting opendkim and 
opendmarc not reject detected maillist will be solution, even if openarc 
comes or not, in cpan Mail::Milter::Authenticated its solved, but who 
use it other then fastmail.fm ? :=)

On 10/02/2019 12:49, Benny Pedersen via dovecot wrote:
> fixing mailman will be the fail, solve it by letting opendkim and opendmarc
not reject detected maillist will be solution,
A general broad mailing list whitelist will be problematic, do work it
needs to look for specific list type hidden headers,  spammers and
nasties will incorporate those headers into their trash that
impersonates mailing lists and voila, they pass. there is no quick and
easy fix to the dmarc mess other than p=none aspf=s (DKIM is another one
that gets narky at lists, and despite all the spf haters dreams, I've
never had a problem with spf and lists, and we were an early beta
adopter of spf) 

-- 
Kind Regards, 

Noel Butler 

 		This Email, including any attachments, may contain legally privileged
information, therefore remains confidential and subject to copyright
protected under international law. You may not disseminate, discuss, or
reveal, any part, to anyone, without the authors express written
authority to do so. If you are not the intended recipient, please notify
the sender then delete all copies of this message including attachments,
immediately. Confidentiality, copyright, and legal privilege are not
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PDF [1] and ODF [2] documents accepted, please do not send proprietary
formatted documents 

 

Links:
------
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[2] http://en.wikipedia.org/wiki/OpenDocument
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