I'm writing a lightweight webmail script to check my email when I can't use a proper desktop client (SquirrelMail is horrible, RoundCube is way too slow and Horde is a pain to install).
It works fine on another host (I can connect to my ISP IMAP server and my DH IMAP server).
On a DH webserver, I can connect fine to my ISP IMAP server but it cannot connect to the DH IMAP server.
I have compiled my own version of PHP5 (as documented in the wiki).
So - is this some kind of firewall / network issue between my DH webserver and my DH IMAP server? If so - is there an internal address I can use rather than mail.mydomain.com? Or does the issue lie elsewhere?