Client certificates and PDA's

[Nicholas Brealey]

Dear all,

I am using Cyrus IMAP with imaps, tls_require_cert and plain logins. 
Sendmail is also configured to require a client certificate to relay e-mail.

This setup works well with Mozilla Thunderdbird (but does not work with 
Outlook 2003).

Are there any PDAs and software which will work with this setup or do I 
need to look at doing access with out client certificates over a VPN?

Thanks for your help,

Nick