I think you're looking for section 4.1.2.
Partial excerpt:
<mailbox> ::= <local-part> "@" <domain>
<local-part> ::= <dot-string> | <quoted-string>
<name> ::= <a> <ldh-str> <let-dig>
<ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
<let-dig> ::= <a> | <d>
<let-dig-hyp> ::= <a> | <d> | "-"
<dot-string> ::= <string> | <string> "." <dot-string>
<string> ::= <char> | <char> <string>
<quoted-string> ::= """ <qtext> """
<qtext> ::= "\" <x> | "\" <x> <qtext> | <q> | <q> <qtext>
<char> ::= <c> | "\" <x>
<dotnum> ::= <snum> "." <snum> "." <snum> "." <snum>
<number> ::= <d> | <d> <number>
<snum> ::= one, two, or three digits representing a decimal
integer value in the range 0 through 255
<a> ::= any one of the 52 alphabetic characters A through Z
in upper case and a through z in lower case
<c> ::= any one of the 128 ASCII characters, but not any
<special> or <SP>
<d> ::= any one of the ten digits 0 through 9
<q> ::= any one of the 128 ASCII characters except <CR>,
<LF>, quote ("), or backslash (\)
<x> ::= any one of the 128 ASCII characters (no exceptions)
<special> ::= "<" | ">" | "(" | ")" | "[" | "]" | "\" | "."
| "," | ";" | ":" | "@" """ | the control
characters (ASCII codes 0 through 31 inclusive and
127)
*************************************************************
Chris Scharff [EMAIL PROTECTED] www.swinc.com
Simpler-Webb, Inc. Austin, TX +1-512-322-0071
"Are you pondering what I'm pondering?"
"I think so Brain, but . . . if we give peas a chance,
won't the lima beans feel left out?"
*************************************************************
> -----Original Message-----
> From: Fryer, Daniel M [mailto:[EMAIL PROTECTED]]
> Sent: Monday, September 03, 2001 8:16 AM
> To: Exchange Discussions
> Subject: SMTP Addressing
>
>
> All,
>
> does anyone know where I can get a list of all valid SMTP
> characters? I have checked RFC821 and there seems to be info regarding
> length of username and domain name etc, but not specific
> character lists.
>
> thanks
>
> Dan Fryer
> Project Manager
> GSK Messaging
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