* More log levels?
* Allow an explicit "append" option to specify what rewrite appends? (For
when user's pop3 host isn't the same as his SMTP host.)
-* Rewrite maps "From: John Smith (Systems) <jsmith@domain>" to
- "From: John Smith@my.pop.server (Systems) <jsmith@domain>". Is this
- just GIGO, or should we try to cope?
Other TO-DO items: