> I know from experience that many DNS's do not refresh very
> often. However some do.
FYI, all DNS servers (should) refresh the information at exactly the same frequency.
When a DNS server looks up information on your domain (for example, the MX record for
"yourdomain.com"), it contacts one of your DNS servers to get the answer. One of the
pieces of information that it receives is the "TTL" value. If you have the TTL set to
1 week, for example, the DNS server will cache the value for 1 week (so if you make a
change today, it could take up to a week for other DNS servers to be aware of the
change). Every subsequent lookup (until the TTL value expires) is taken from the DNS
cache.
Therefore, you are in complete control over how long other servers cache the DNS
entries.
Your TTL appears to currently be 24 hours. If you change the TTL to 1 hour now, then
within 24 hours all DNS servers will be checking every hour for updates to your DNS.
Then, when you have made a change, you can set the TTL back to 24 hours (so you do not
get unnecessary extra traffic).
--
-Scott
Declude: Anti-virus and Anti-spam solutions for IMail. http://www.declude.com
--
Please visit http://www.ipswitch.com/support/mailing-lists.html
to be removed from this list.
An Archive of this list is available at:
http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
