Legal local-part - ReadList.com

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Legal local-part
\ LuKreme (22 Sep 2007)
. \ (Wietse Venema) (22 Sep 2007)
. . \ LuKreme (23 Sep 2007)
. . . \ (Wietse Venema) (23 Sep 2007)

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Subject:	Legal local-part
Group:	Postfix-users
From:	LuKreme
Date:	22 Sep 2007

The following characters are defined as legal for the local-part of
an email address:

* All alpha numerics (A-Za-z0-9)
* The characters ! # $ % * / ? | ^ { } ` ~ & ' + - = _
* The character ., non-repeated, as long as it is not first or
last

So, for kicks I created a new local user with the username:

#test{!user%}^

and then sent a test email to it. Postfix complained:

warning: Illegal address syntax from munge[munge] in RCPT command:
#test{!user%}^@covisp.net

So, just out of curiosity, which characters are legal for procmail?

--
"I do not feel obliged to believe that same God who endowed us with
sense, reason, and intellect had intended for us to forego their
use." -Galileo