How to Change/Move Domain smoothly

Chris Buxton cbuxton at
Wed Jun 4 16:44:59 UTC 2008

Most likely, the SOA record values will have no effect at all on your  
changeover. Lowering the refresh time just causes the slave servers to  
check in more often for zone updates. With a modern version of BIND  
and correctly set up NS records, the master will notify the slaves  
whenever the zone is updated, making the refresh interval a fallback  
mechanism that's rarely needed.

It would be better to focus your efforts on the TTL's of the MX  
records in question. Ignore the SOA record.

To check your changes with dig, just ask the server in question about  
the record in question. For example:

dig soa +norec


dig mx +norec

The "+norec" causes dig to send iterative queries instead of recursive  
queries. This is good for debugging and testing.

Chris Buxton
Professional Services
Men & Mice

On Jun 4, 2008, at 2:01 AM, ml at wrote:

> Hello List,
> i would like to change the MX record of a few domains.
> Whats the best way to do this?
> Right now i have set it to:
> (...)
>                                    2008060403
>                                    15m     ;refresh
>                                    1h     ;retry
>                                    7d     ;expire
>                                    1d
> (...)
> Is this okay? Should i lower the retry time, too?
> How can i check my changes with dig?
> Thanks, Mario

More information about the bind-users mailing list