[GLLUG] Checking mail server configuration specifically for IPv4

[Andy Smith]

Hello,

On Sat, May 30, 2020 at 04:23:44PM +0100, John Winters via GLLUG wrote:
> I tend to use check-auth at verifier.port25.com 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.

What if you forced your mail server to use an IPv4 address when
talking to verifier.port25.com? Here's how to do it in Exim:

    https://github.com/Exim/exim/wiki/How-to-force-IPv4-connections-for-specific-domains-if-IPv6-is-enabled

Cheers,
Andy

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