[ipv6-wg] Real-world IPv6 SMTP experience

On Dec 21, Stig Venaas <Stig.Venaas at uninett.no> wrote:

> I know several sites that have both A and AAAA for all MXs. It doesn't
> sound safe to me, but I assume it can't be that problematic then...?
In my experience (linux.it and other domains, IIRC since three years)
a single MX record with A + AAAA records has not caused deliverability
errors for incoming nor for outgoing mail. The same applies to a domain
with A and AAAA records and no explicit MX.

(I had many more troubles from broken CPMTA installs, which for some
unknown reason in Italy are often configured by default to not deliver
mail to domains without a MX record.)

-- 
ciao,
Marco
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