On Thu, 2016-08-04 at 17:20 +0100, Andrew Beverley wrote:
> On Thu, 04 Aug 2016 Patrick O'Callaghan <p...@usb.ve> wrote:
> > Correction, there are a couple of outliers (one from outlook.com)
> > but
> > I'm inclined to think those are genuine bounces, e.g. mailbox full
> > or
> > user unknown. Trouble is we don't have access to the actual bounce
> > message so it's basically guesswork.
>
> It's a nightmare, as the DMARC record on Yahoo email addresses can
> cause any other member's email address to bounce (and be removed).
>
> The DMARC record tells receivers to reject the email if not received
> directly from Yahoo. So some...@yahoo.com sends an email to the list,
> the list forwards to ot...@outlook.com, ot...@outlook.com rejects as
> it's not directly from yahoo.com. ot...@outlook.com then clocks up a
> bounce failure within the list software.
>
> The only solution is for the list software to be altered to rewrite
> the
> from address of DMARC domains, or for people with DMARC domains (e.g.
> @yahoo.co.uk) to use a different email address to send to the list
> (e.g. Gmail)
>
> As someone has already said, DMARC was never envisaged for this sort
> of
> use (instead it's for @paypal.com etc), but it looks like it's here
> to
> stay (or at least until if/when ARC is implemented for email
> forwarding).
>
> Andy
It's my lack of understanding as to how all this works. I had simply
assumed that when I sent a mail to the list, it just went to the list -
and was 'from me'. Any mails then from the list back 'out' (ie to me
and the other subscribers) I had assumed just came from the list (I
thought that ALL Evolution list messages came from the list directly,
not redirected and still using the subscribers EMail) - so I couldn't
see why Yahoo's DMARC policy then caused any issue (as it would only
then be checking that list messages actually came from the list). But
if I have got this right, you're saying that messages 'from the list'
aren't necessarily marked as being from the list, so Yahoo bounces them
- is that correct?
Are all list EMail redirected as if from the subscriber - as if so, I
think I'm still lost as to how ANY mails then get through from the list
to me - surely all mails from the list would fail the DMARC test?
Steve T
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