[Gllug] How to handle spam bounces from secondary MX server

[John Winters]

> One current spammer technique is to batch-query MX records and publish the
> results to the botnet. Their cache of MX records is held for a long time,
> so
> periodically changing your mailserver IPs can help.

Alas, I have only one appropriate IPv4 address available.

OTOH, I have an extremely large number of IPv6 addresses.  Do you think
publishing only an AAAA record for my mail server would help reduce spam?

Cheers,
John

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