[ih] The Atlantic on Email

[John Levine]

>that both were used in Internet mail.  Of course, "!" was used in uucp
>routing "bang paths" (not on the Internet except as the
>pseudo-local-part associated with a gateway)

I'm reasonably sure I know people who did uucp over TCP/IP, but for
most of us, the faster we could get rid of our bang paths the better.

For several years there was a project that maintained a distributed
uucp connection database so if you sent mail to decvax!bob or
bob at decvax.uucp, your MTA could rewrite it to
moe!larry!curly!decvax!bob.

R's,
John