IP address changing; any sendmail issues?

[Kenneth Porter]

schulz at adi.com (Thomas Schulz) wrote in <Fw3KH4.B1v.0.bluegill at adi.com>:

>As the time of the change approaches, start lowering your TTLs (time to
>live).  That is: at 5 days before the change lower yor TTLs to less than
>4 days, at 4 days before the change lower your TTLs to less than 3 days,
>etc.  Just before the last day lower the TTLs to an hour or so.  A few
>hours before the change, lower the TTLs to a few minutes.
>After the change, put your TTLs back to their normal values.

Makes sense. I just checked with nslookup and my A record is already at 
about 7 hours and my PTR record is at 4 minutes (!). I'll just have the 
server for the A record drop the TTL to 10 minutes or so the day before the 
change.