> My blackberry stopped downloading emails ever since the email server's
> IP got changed. Does anyone know how to fix this? I called
> Nextel/Sprint and they were very vague.

The IP got changed? Did you configure your blackberry with the IP address
or with a domain name? If you configured it with the IP then you'll have to
reconfigure it for the new one. If you configured it with a domain name
then you'll have to make sure that domain name resolves to the new address.
Or if they changed the domain name for the server you'll have to reconfigure
the blackberry as well.

DNS names take time to propogate. If your server DNS name was
'mailserver.example.com' on IP address 1.2.3.4 and the address was changed
to 4.3.2.1 then it may take couple of days for the servers to pick up on it.
This assumes, of course, that the people in charge of the mail server and
the DNS records actually configured things properly. Sadly, far too many
folks calling themselves sysadmins fail to get this all done properly. But
that's a different issue...