Dear all,
I've been having a recent problem with one of my mail servers and one
particular e-mail provider not liking its reverse DNS lookup result for
IPv4.
I tend to use [email protected] to diagnose these things
but I've hit a problem. Both my mail server and theirs are fully IPv6
enabled, and all is good in IPv6.
Does anyone know a way of forcing a similar check to use IPv4? The
e-mail provider with whom I'm having difficulty publishes only IPv4 MX
records.
TIA,
John
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