Adding new mailboxes

Does anyone else have trouble adding mailboxes and retrieving the mail using a client? I added new users and I can get mail using webmail, but not using a client. I get the following error when using entourage:

Could not retrieve mail from the account. A connection failure has occurred. Error: -23012

I think it may be an entourage problem. I'm getting mail fine using a different client.

 

I test with Outlook, OE, and Thunderbird, which all my friends and family uses. All can fetch and send mail.

 

How do I tell if it's listening on all ports? What ports need to be open on the firewall?

 

Run

Code:

netstat -tap

If there's a * in front of pop3 and imap then it's listening on all IP addresses (IP addresses, not ports!).
POP3 uses port 110, IMAP port 143.