Check out libspf for SPF support.
Establish standard names for messages when errors happen and such.
Check out bmf as an alternative spam filter.
Implement a spam handler too for global spam protection.
Implement the SQLAlchemy store again, and look at a TC backend.
Implement a USR1 signal handler to reset states inside lamson.
Need to have a thing for the lamson.handlers.forward so that it only forwards for a given host regex, or maybe just use router's host regex setting.
Add or replicate any informational message on mulitpart messages.
Replicate all content-type and content-disposition headers that aren't charset.
