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What does it take to get "Envelope-To:" ▻

is "additionalstuff:account@isp.com" legit?

In article <01bc564e$aeaad3c0$2c28010a@jeff.1000klub.com>,
Paul Chinn <loomer@1000klub.com> wrote:
>I've noticed that I can prepend anything at all with a colon to the front
>of an account name and it will get delivered properly to the account.

This is almost the RFC 822 group syntax: you can enclose a list
of addresses in "<phrase>: <list> ;", where <phrase> can be just about
anything, <list> is a comma-separated list of addresses, and the colon
and semicolon are literal.

Usually, user agents that support the group syntax remove the list of
addresses during the submission process.  For example, I can address
a message like this.

    To: Interested parties: you@there.com, him@the.other.org;

My user agent strips the addresses, and the recipients see this.

    To: Interested parties:;

>       I'm wondering if this is some sort of standard, or defined behavior,
>and if so, where I could read up on it.

RFC 822, if you're feeling strong.  It's also discussed in Marshall
Rose's book, "The Internet Message".

Tim.
--
Tim Goodwin | "I'm a west coast kinda guy, I'm not even sure
UUNET, UK   | where Washington is.. :-)" -- Jordan Hubbard

Original headers:

From: tim@pipex.net (Tim Goodwin)
Newsgroups: comp.mail.headers
Subject: Re: is "additionalstuff:account@isp.com" legit?
Date: 2 May 1997 16:25:02 GMT
Organization: UUNET, Cambridge, UK.
Message-ID: <5kd4gu$4t9@tube.news.pipex.net>
References: <01bc564e$aeaad3c0$2c28010a@jeff.1000klub.com>

△ comp.mail.* △

◅ Returned messages subject headers

What does it take to get "Envelope-To:" ▻