To answer respondents -
IMAP is a nice protocol but it's receive-only, as is POP. Neither one of them
has anything to do with sending email. (SMTP is for that.)
The web host company has sendmail working fine. I am using it (and procmail).
The problem is, I can't exercise sendmail from a REBOL script even though they
have REBOL on the server.
The company claims it can't provide authenticated SMTP and are faced with a
choice of "open-relay" SMTP (spam-bait) or nothing. So they provide nothing so
far as SMTP is concerned.
They told me this inability to authenticate SMTP was a function of their Sun
Solaris 2.7/Apache server software. (If anyone has ideas how they could
configure authenticated SMTP I would be glad to hear about it.
Mark