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underscore vs. dot

In article <4hi33u$9hn@news.duke.edu>, Michael Grubb <mg@oit.duke.edu> wrote:
>                                                 Are there any standards
>that would govern?

RFC 1327, the standard for gatewaying mail between the Internet
and X.400, specifies that X.400 addresses of the form

    G=Fred;S=Bloggs;...

map to and from Internet addresses of the form

    Fred.Bloggs@...

You probably don't care about X.400, but this standard does mean
that use of `.' is more widespread.

>                    Does one character close off options that are left
>open by the other?

We-ell, it's illegal to have two adjacent `.'s in an RFC 822
localpart, so if you ever have a user whose surname begins with a
period... :-)

Tim.
--
Tim Goodwin   | "MS-DOS is dwindling, only to be replaced by something
Cambridge, UK | even more bizarre and incomprehensible." -- Steve Summit

Original headers:

From: tim@pipex.net (Tim Goodwin)
Newsgroups: comp.mail.headers
Subject: Re: underscore vs. dot
Date: 7 Mar 1996 15:32:07 GMT
Organization: Unipalm PIPEX
Message-ID: <4hmvhn$lep@wave.news.pipex.net>
References: <4hi33u$9hn@news.duke.edu>

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