"Smart mail" or "web mail" is an HTML-driven mail client that uses RDF, JavaScript and HTML to read mail. For real. This is not Netscape Messenger. This is not the mail from Netscape Navigator 3.0. This is something else.

how it works

There are three major parts to smart/web mail:

Networking: network/protocol/pop3/mkpop3.c: This code talks to a POP server and gets mail. It sorta does multiple accounts, but there's some global cruft that needs cleaning up. When it gets the mail, it feeds it to pm2rdf.c (see below). There's a lot of old stuff cut-and-pasted into here from libmsg and biff and Nikki days. Cleanup would be good. It also handles mailbox:// URLs.
TODO: lots of cleanup, imap and/or nntp support.
RDF data source code: modules/rdf/src/pm2rdf.c: It's an RDF data source. Berkeley-style mail folders and their summary files are presented to the "shack" widget (Aurora RDF-tree widget embeddable in HTML), which then does display and other stuff. The mail folder management is "weak at best", so nobody's going to be offended if you send in a patch that replaces it wholesale. (It's about 500 lines, including the RDF reflection code, if that encourages you at all.) We currently let you read, copy, move and delete messages, but mail is always left on the server. (This is for your protection.) The summary file ("ssf" for "Silly Summary File") is just ASCII, which makes debugging easier.
TODO: should use NSPR and not libc. folder management rewrite, possibly RDF reflection rewrite. Compaction of folders, other flags for forwarding, etc. Filtering (talk to guha if you want to do this -- there is a right and cheap way to do this with RDF and JS).
Front end: HTML!: The heart of the front end is the "shack" and "ender" HTML widgets. "Ender" is an HTML-aware <TEXTAREA>. "Shack", as mentioned above, is the Aurora widget in an <OBJECT> tag. Both these widgets can be improved a lot, which would make other parts of Mozilla happier too. (Try to do things better in the XP code. You know it's the right thing.) Right now, ender and shack work properly only on Win32. We are more sorry about this than you are. Because the interface is all HTML and the back-end groks RDF, this can be totally customized and server-driven. You get the best of fat mail (slick UI, locality of operation) with the best of webmail (location independence, ease of upgrade).

how to build it

Get the recent source.
Set SMART_MAIL and MOZ_ENDER to 1.
Build it.
Try it out: client-side or server-side.
Can't try it out? Check out the screenshot.

it sucks! it rules!

Send feedback to smartmail@netscape.com, or post to the mail-news newsgroup or mailing list. (Newsgroup and mailing list info is here.)