On 12 Feb 2021, at 01:41, Chris Green <c...@isbd.net> wrote:
> On Thu, Feb 11, 2021 at 11:09:06PM -0700, Bob Proulx wrote:
>> Bryan L. Gay wrote:
>>> I'm seeing some mailing list messages with to:
>>> postfix-us...@cloud9.net in the header. I had to update my filters to
>>> get them sorted into my postfix mailing list folder.
>>
>> If one is filtering mail selecting for mail through a mailing list
>> then one should not use the To: or Cc: for that filtering. The best
>> and expected header to use is the List-Id: header. That's the
>> standard mailing list header. See RFC2929.
>>
>> RFC 2929 https://tools.ietf.org/html/rfc2919
>>
>> All mail through this mailing list sets this header.
>>
>> List-Id: Postfix users <postfix-users@postfix.org>
> Yes, that's all very well, but not all mailing lists are so well
> behaved
Most are. The drawback is that some marketing emails pretend to be mailing list
messages as well. mcsv.net is one popular mailer that does this.
> so a general mailing list filter can't rely on this. One would
> have to base the filter on a combination of things.
I think I have three rules in Sieve that catch all list mail, but nearly all is
caught by the first that checked List-ID.
Ah, nope, I see I trimmed back to just the single list-id rule.
if header :regex "list-id" "^\\s*<?([a-z_0-9-]+)[.@]" {
set :lower "listname" "${1}";
fileinto :create "${listname}";
}
(I do have some custom rules for some lists to rewrite the reply-to header, or
to group related lists into a single folder
--
It's the terror of knowing what this world is about
Watching some good friends screaming let me out
Gets me higher pressure on people, people on the streets
