[Exim] Mail clients vs SMTP AUTH methods

Specific question: do those of us here know of any somewhat or very
popular email client which will only use CRAM-MD5 of the SMTP AUTH methods
accepted by Exim?

General question: is there a handy table somewhere of what method(s)
various clients are willing to use?

And another: how about the proxy that Norton AntiVirus sticks into the
data flow on outgoing messages?

Thanks.

   --John (fearing an RTFM with a reference to well-known answers)
--
John Baxter   jwblist@???      Port Ludlow, WA, USA