[PHP] imap_open and 503 Error

Anyone ever encounter a 503 server error when trying to open a stream to a mailbox using imap_open? If so, anyway to fix it? Thanks, Brian

[PHP] imap_open Error

I'm using the following code to try to open a stream to access my email: $user_id = "userid"; $password = "password"; $inbox = @imap_open("{mail.host.com:143}INBOX", $user_id, $password); I've verified the correct username, password, hostname combination by setting up an IMAP account thr