KMail, Spam, Advice Wanted

I use kmail (KDE Mail) for all Email. Currently, Kmail is configure=

d to=20
go and fetch my Email from four different places every ten minutes or so=20
(while launched and sitting on my desktop).
     I need to implement two changes: first, the spam is getting utterly=20
ridiculous and I need something automatic to pre-classify incoming traffi=
c=20
into "might be spam" and "probably not spam" (and "definately spam"?)=20
categories.
     Secondly, I need to split my wife's email out into a separate "place=
" so=20
she can read it from her machine (and mail program) at a different time.

     Here's what I think I need to do (please correct my thinking or, if=20
there's a better way, please let me know):

1) Use fetchmail to retrieve Email from external servers and put the mess=
ages=20
somewhere "local" (on machine #1 which is up 100% of the time).
2) Use ????? to paw through that mail and do the anti-spam filtering.
3) Use kmail (on machine #1) to read my (now local) mail, and
4) Let my wife use a different mail reader (probably Mozilla's built-in) =
to=20
read her Email when logged on to her system (machine #2).

     Looks like I'll have fetchmail set up in a cron entry, and I'll need=
 to=20
have an SMTP agent on machine #1 to "serve" the Email out to me (kmail, o=
n=20
same system) or my wife (mozilla, different system).
     Does that look right? (Suggestions for the spam filtering daemon wou=
ld be=20
appreciated.)

     TIA!

--=20
Ed Skinner, ed@flat5.net, http://www.flat5.net/