Outlook 2000: Internet Security Warning

Iam using Outlook2000 to connect to my IMAP4 email account. I get the following message everytime that it fetches email:
‘The server you are connected to is using a security certificate that does not match its Internet address.” “Do you wnat to continue using this server?” Then there is a yes and no. I have looked at Microsoft website but without any help. Is there anyone that has run into this and what did they have to do to resolve the message?

TIA Jordan