imap_open with port other than 110

We're trying to use imap_open to access a pop3 server which is using port 120 instead of 110. We know the port and pop3 server are working because we can access it from Outlook. $pop_inbox = imap_open("{".$mailserver."/$mailbox_type:$port}",$login,$password); The code worked fine with port 110 but now it can't open a stream. I've tried it with "INBOX", putting the port next to the mailserver, etc. but nothing works when the port isn't 110. I'd appreciate any ideas. Thanks, Jeff --------------------------------- Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now