On 2026-01-22 at 15:38:15 UTC-0500 (Thu, 22 Jan 2026 20:38:15 -0000)
Paul Gregg via mailop <[email protected]>
is rumored to have said:
Also seeing DNS failures (SERVFAIL) on looking up A records for the
domain-com.mail.protection.outlook.com where we send the inbound
messages
to. Because of this we're NDRing mail instead of deferring. This
one's
going to be messy.
That's why the proper response to a non-definitive DNS failure (no
response or SERVFAIL as opposed to NXDOMAIN or NOERR with 0 answers) is
deferral, not rejection.
But of course: your server->your rules...
--
Bill Cole
[email protected] or [email protected]
(AKA @[email protected] and many *@billmail.scconsult.com
addresses)
Not Currently Available For Hire
_______________________________________________
mailop mailing list
[email protected]
https://list.mailop.org/listinfo/mailop
