I'm using Chatter (75:24), my carrier is Vodafone Australia. Handset is a Treo 650.

I can run IMAP from fastmail & I can run POP from my 'backup' mail provider, but I can't get an IMAP connection to my Exchange server.

The Exchange server can be reached by POP from Fastmail.

I've created a "hole" in my firewall on port 993 for IMAP SSL traffic, but nothing is arriving in Chatter on my Treo 650.

I've got "use SSL" and "Trust Certificates (SSL)" both on.

Do I need to setup something on the Exchange server ? Perhaps a different 'shaped' hole in the firewall ?