Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!spool.mu.edu!sdd.hp.com!wuarchive!uunet!fernwood!portal!cup.portal.com!Will
From: Will@cup.portal.com (Will E Estes)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Authenticated SMTP, anyone done one?
Message-ID: <43225@cup.portal.com>
Date: 12 Jun 91 20:56:26 GMT
Article-I.D.: cup.43225
References: <1991Jun3.163841.4114@bwdls61.bnr.ca>
  <17169:Jun1122:04:5791@kramden.acf.nyu.edu>
Organization: The Portal System (TM)
Lines: 22

<RFC 931 can be used over any part of the Internet. In fact, it's the
<only working freely available wide-area TCP authentication code I know
<of. If you do want to restrict access to the local net or to
<authenticated connections, you can use my attachport (comp.sources.unix
<volume 22) or shuctld (coming very soon to a source group near you).

Then what is the purpose of RFCs 1113, 1114, and 1115 on Privacy
Enhanced Mail (PEM)?  My understanding was that this service was going 
into effect very soon throughout the Internet.

Maybe someone with more knowledge on these subjects could clarify
the following issues:

1) Does PEM address all of the security and authorization issues for
sending mail on the Internet?

2) Is PEM the preferred approach for building security into private
company Internets as well?

Thanks,
Will Estes        Internet: Will@cup.portal.com
                  UUCP: apple!cup.portal.com!Will