Sean Cotter put together the following document on using the preliminary
s/mime functionality now present in daily mozilla builds. The UI is
not fully implemented.
It includes information on getting a test certificate so that one can
get going. Note that these certificates have a 7 day validity period,
so one has to go and obtain new certs fairly regularly.
http://www.mozilla.org/projects/security/pki/psm/smime_guide.html
Note that the mozilla s/mime ui specs were published in this newsgroup
and are available at:
http://www.mozilla.org/mailnews/specs/security/
Stephane Saux,
Crypto Client features mgr.
Netscape Communications.