Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site im4u.UUCP
Path: utzoo!linus!philabs!cmcl2!seismo!ut-sally!im4u!jsq
From: jsq@im4u.UUCP
Newsgroups: net.mail
Subject: Re: Compatibility?
Message-ID: <429@im4u.UUCP>
Date: Thu, 15-Aug-85 18:25:13 EDT
Article-I.D.: im4u.429
Posted: Thu Aug 15 18:25:13 1985
Date-Received: Mon, 19-Aug-85 20:03:36 EDT
References: <3700002@ndm20>
Reply-To: jsq@im4u.UUCP (John Quarterman)
Organization: U. Texas CS Dept., Austin, Texas
Lines: 31

In article <3700002@ndm20> tp@ndm20 writes:
...
>I am on a Sys V machine. My only mailer is mail(1). I don't have 
>sendmail. Actually, I believe that is berkely only. I don't have
>a source license. My only neighbor is a site that also happens to
>be on CSNET. His mailer gives @ precedence over !. I have no control
>over this. If domains are adopted, I will be cut off from mail until
>such time as there is a UUCP domain server on either arpa or csnet,
>because mail to mark@cbosgd.att.uucp will look to a csnet site like
>something to foist upon arpanet for delivery. 
...

You will probably find that your System V /bin/mail does
know about the UNIX From space line, if it has a reply command.
It doesn't know about RFC822 headers, but it doesn't have to.

Mail to neighbor!ihnp4!cbosgd.att.uucp!mark, where neighbor is your
neighboring site which is also on CSNET.  It's a pure UUCP address
syntactically (all bangs, no ats).  There's no reason the CSNET site
should interpret it as anything else.  (Also, uucp is not a valid top
level domain in the Internet, so there's no reason a CSNET host should
send mail for cbosgd.att.uucp to the ARPANET anyway.)

There is no compatibility problem, and no fragmentation of the UUCP
network.  Domains and old-style routing co-exist.  You don't need any
new software.  Your CSNET neighbor doesn't need any new software.  Many
people will, however, get new software, because they will find domains
work better than source routing.
-- 
John Quarterman,   UUCP:  {ihnp4,seismo,harvard,gatech}!ut-sally!jsq
ARPA Internet and CSNET:  jsq@ut-sally.ARPA, soon to be jsq@sally.UTEXAS.EDU