On 10/10/2011 15:42, enigmedia wrote: > Hi All: If I need to set a short TTL prior to an MX IP change, do I need to > modify the TTL of the MX record, or just the A record the MX points to? > (There's just a single A record for the MX).
You want to drop the TTL on the RR where the data -- the RHS of the
zonefile -- changes. So if you have:
example.com. IN MX 10 smtp.example.com.
smtp.example.com. IN A 192.0.2.1
and you want to change that to
example.com. IN MX 10 smtp.example.com.
smtp.example.com. IN A 192.0.2.25
then you only need to shorten the TTL on the A record, not the MX record.
Cheers,
Matthew
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