STARTTLS outgoing SMTP

Hi,

I'm just setting up Leopard Server as a trial for a client. I'm trying to setup outgoing SMTP mail however i'm using SKY broadband and all their IP addresses are blacklisted. I want to use SKY's SMTP relays which are offered by googlemail.

When connecting though they require TLS and I can't for the life of me figure out how to enable STARTTLS to be sent when connecting. I've tried a lot of different settings and none of them have worked.

Any ideas?

Rgds

Andy