Documentation about ZMailer

[Shahjehan Khatri <Shah@ASU.Edu>]

Hello!  Can somebody please point me to additional, more up-to-date 
sources of information about ZMailer?  The README file in the doc/design 
directory of the ZMailer package available from cs.utoronto.ca says that,
"This design document is 3 years old.  Don't believe what it says.
It is included only to provide general background information, until
it can be updated for the final release."

Any replies will be greatly appreciated.

Thanks.