CvsTrac does not natively do anything with e-mail.  However, given that it
tracks CVS changes so nicely,
and integrates bug tracking with that, it would be really really awesome if it
could track support issues
as well.

To do this, you'd need (as ticket #66 suggests):

1: A way for new incoming e-mails to open tickets
1: A way for cvstrac to send updates to tickets to the initial e-mail source
1: A way for reply incoming e-mails to append to a ticket

There is a script at http://www.engelschall.com/~rse/cvstrac/cvstrac-mailgate
(link broken) that appears to attempt
to solve some of this.  See also #557. CvsTrac also already provides hooks for
sending updates of tickets, which are
explored in
http://the.taoofmac.com/space/HOWTO/Send%20CVSTrac%20Ticket%20Updates

Thoughts about the other issues:

*: Should the approach taken be to post form data to CvsTrac, like the mailgate
script does?  Or to just
update the database with a C filter program?
*: Obviously there would need to be separate e-mail addresses (or prefixes, or
something) to handle
MultipleCvsRepositories

It seems like it would be nice if this could be grafted onto cvstrac instead of
hacked into it.