SMTP proxies for Windows

[D. J. Bernstein]

Glenn writes:
> What's needed for Windows is a simple, but configurable program that
> runs on the user's machine and listens to localhost:25.

Right. MUAs can use 127.0.0.1:25 (and 127.0.0.1:110) by default. An ISP
can supply its favorite proxy program, including configuration, directly
to the users. Some benefits:

   * Users won't have to type in server addresses.
   * ISPs won't have to explain how to configure different MUAs.
   * MUAs won't have to deal with different ISP authentication systems.

Today's proxies could provide authenticated mail submission for roaming
users. Tomorrow's proxies could support backup servers, faster message
injection, and maybe even strong encryption.

---Dan