Stephen J. Turnbull wrote:
>
> Jon Baron writes:
> >
> > Prevented the use of digest on the list. I noticed that a large
> > proportion of the bounces came from members who had chosen the digest
> > format. I suspect that this had to do with the MIME encoding.
>
> I don't think that's likely, although it's possible. Most mail
> nowadays is MIME-encoded. More likely the problem is the boilerplate
> in the header and table of contents, and there are likely to be a
> *lot* of URLs for stripped attachments (if you set that).
>
> > Probably there are ways to avoid having to [disable digests].
>
> I imagine there are, but it depends on why it was necessary, if indeed
> it was. :-) As you describe it it is *very* low-cost for your
> subscribers so randomly ;-) disabling it to see if that helps is a
> reasonable strategy.
Just on the topic of Digest emails, I got this bounce today. Is it because of
the From: and To: fields or a more fundamental problem?
Action: failed
Status: 4.0.0
Remote-MTA: dns; eu-smtp-inbound-1.mimecast.com
Diagnostic-Code: smtp; 451 Open relay not allowed -
https://community.mimecast.com/docs/DOC-1369#451
From: listname-requ...@example.co.uk
Subject: Listname Digest, Vol no, Issue 1
To: listn...@example.co.uk
Reply-To: listn...@example.co.uk
The Mimecast website states:
"Both the sender AND recipient domains specified in the transmission are
external to Mimecast, and aren't allowed to relay through the Mimecast service
and / or the connecting IP address isn't recognized as authorized.
Mimecast customers should contact Mimecast Support for add the Authorized
Outbound address, or to take other remedial action."
Best wishes
Jonathan
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