changing ttl of mx record

Matthew Seaman m.seaman at
Mon Oct 10 16:34:52 UTC 2011

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:		IN MX	10	IN A

and you want to change that to		IN MX	10	IN A

then you only need to shorten the TTL on the A record, not the MX record.



Dr Matthew J Seaman MA, D.Phil.                   7 Priory Courtyard
                                                  Flat 3
PGP:     Ramsgate
JID: matthew at               Kent, CT11 9PW

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 267 bytes
Desc: OpenPGP digital signature
URL: <>

More information about the bind-users mailing list