SMTP over IPv6 : gmail classifying nearly all IPv6 mail as spam since 20140818
md at linux.it
Sat Aug 23 23:20:46 CEST 2014
On Aug 23, Brian E Carpenter <brian.e.carpenter at gmail.com> wrote:
> Actually I think you should quibble. The issue isn't "bad" software
> used by intermediaries, it's that by design DMARC p=reject breaks a
> very common model used by intermediaries. Whether that is a bug or a
> feature in DMARC is out of scope for this thread, however.
I was not referring to the mailing lists issue, which is not relevant
unless you also use DMARC with p=reject, but to broken MTAs which mangle
forwarded messages (look for DKIM validation failures and you will
easily find many).
There is a reason if DMARC was designed to use both SPF and DKIM.
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