iphone not connecting to exchange via 3g

we allowed our domain name to lapse with Network Solutions  registrar.

as a result all of our dns records (on file with telepacific.com) ended up
on the 208.91.197.x network...
Email, websites and so on stopped working

wednesday at 6pm we resolved our problems with Network Solutions..
gradually, email is being received again from most email servers.

however... I-phones cannot connect to our Exchange 2003 server thru 3g .
They are on an at&t plan.

when i do an
nslookup and point to a server that should be the main att dns server for at&t
(which i got form doing a google search of "at&t dns servers)
  the responses for our records appear to be correct

set type=A

the response--is correct

Can anyone help solve the i-phone problem: "Cannot get mail ..connection to server failed"
Who is Participating?
Alan HardistyConnect With a Mentor Co-OwnerCommented:
Chris MillardConnect With a Mentor Commented:
Instead of putting the server name into the iPhone, does it work if you use the IP address of the Exchange server?
Alan HardistyConnect With a Mentor Co-OwnerCommented:
Make sure you set the correct IP address in DNS for the FQDN you are using to point your mobile phones to your Exchange server e.g., mail.domain.com.

Also mobiles can take 24 hours to start working after an IP address change, so it may be a case of waiting.

Use the test site at https://testexchangeconnectivity.com to run the Activesync test and see what the results are, they should give a big clue why things are not right.

Is port 443 open and forwarded on your firewall properly?

edharrisAuthor Commented:
thanks everyone.... the passage of time solved problem...
dns propagation, i guess.
messages are now being pushed to the i phones
Alan HardistyCo-OwnerCommented:
Excellent - always annoying when you have to wait 24 hours after an IP change for the phones to catch up!

Glad it is working.

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