If you receive an error similar to the following when sending and receiving email with Outlook, check that the domain name for the email server is valid.
Task 'email@example.com - Sending and Receiving' reported error
(0x800CCC0D) : 'Unable to find the e-mail server. Please verify the
server information in your account properties.'
A user reported that she could no longer send and receive email. I had her
attempt to connect to port 25 on her email server from a command prompt
with telnet, e.g.
telnet 192.168.2.10 25. She was able
to connect and received the SMTP server's prompt. I then had her
try to connect to the POP3 port, port 110, with
110. Again, she was successful, and was able to enter the
pass commands to access her email on the server. But
when I tried to lookup the IP address of the mail server, e.g. with
nslookup example.com, I received the response
"*** ns2.diginetusa.net can't find example.com: Server failed". I then
discovered that the DNS service for the user's domain name had expired and
needed to be renewed.