Re: List is being blocked as source is SPAMmy...

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Charles, are you sure it isn't some kind of misconfiguration related to
DMARC (DKIM, SPF)? Perhaps there is some munging happening for list
messages that may cause DKIM signatures to fail?

I received the message below from elmlm @ pyropus as part of the list
warning that several messages to me were undeliverable -- looking at DMARC
for pyropus.ca, the policy is reject so any misalignment on SPF or failing
DKIM will cause an issue:

_dmarc.pyropus.ca.      86400   IN      TXT     "v=DMARC1; p=reject;
sp=none; rua=mailto:[email protected]; ruf=mailto:
[email protected]; fo=1; aspf=s; adkim=s;

See below for the bounce the list received:

Return-Path: <>
Received: (qmail 725534 invoked for bounce); 29 Oct 2022 01:40:25 -0000
Date: 29 Oct 2022 01:40:25 -0000
From: [email protected]
To: [email protected]
Subject: failure notice

Hi. This is the qmail-send program at pyropus.ca.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<[email protected]>:
 unexpected error (550, b"5.7.26 Unauthenticated email from pyropus.ca is
not accepted due to domain's\n5.7.26 DMARC policy. Please contact the
administrator of pyropus.ca domain\n5.7.26 if this was a legitimate mail.
Please visit\n5.7.26  https://support.google.com/mail/answer/2451690 to
learn about the\n5.7.26 DMARC initiative.
x9-20020a056830244900b00661c3434336si243319otr.259 - gsmtp")I'm not going
to try again; this message has been in the queue too long.




On Sat, Mar 12, 2022 at 11:38 AM Charles Cazabon <
[email protected]> wrote:

> Gary Schmidt <[email protected]> wrote:
> >
> > I've just gone around in several circles wondering why posts to and from
> > the mailing list were not being sent from/arriving at my usual address,
> and
> > after trying to re-subscribe using my normal addresses finally resorted
> to
> > gmail.
> >
> > It seems that Linode have been put on some "drop silently" lists, and as
> > pyropus.ca (96.126.125.117) is a Linode address, well...
>
> It's not just Linode addresses; small mail service operators of all types
> are
> constantly dealing with this crap from the big providers (Gmail, Outlook/13
> other names MS has for it, Yahoo, etc).  They impose draconian filtering
> and
> change their rules and setups constantly, all of which is trade secret so
> the
> rest of us are left guessing as to how to maximize our "deliverability" to
> those services.  It's bad enough for private mail, it's ten times worse
> when
> you're running mailing lists.
>
> Email used to be *about* "deliverability".  You had it by default.  Now
> Gmail
> goes out of its way to make life difficult for everyone else -- imagine
> that,
> it drives people to use Gmail.
>
> I've had my Linode for almost 20 years. and in that time my machine has
> never
> sent a single spam message.  And yet they still decide to make life
> difficult
> for me.
>
> There's not a lot I (or other small providers) can do about this.
>
> Charles
> --
> -----------------------------------------------------------------------
> Charles Cazabon
> GPL'ed software available at:               http://pyropus.ca/software/
> -----------------------------------------------------------------------
>
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