Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!apple!motcsd!hpda!hpcuhb!hpcuha!hp-ptp!toddp
From: toddp@hp-ptp.HP.COM (Todd_Poynor)
Newsgroups: comp.mail.misc
Subject: Re: Making smail2.5 understand <user>%<site>@<site>
Message-ID: <1960001@hp-ptp.HP.COM>
Date: 12 Oct 89 05:46:26 GMT
References: <1989Oct5.053531.24832@egsner.cirr.com>
Organization: HP Pacific Technology Park - Sunnyvale, Ca.
Lines: 12

>% has lower precedence than @, but is evaluated left to right like @.
>It's precedence is equal to !.

Not quite -- "%" is evaluated right-to-left, as per the example.  There
should only be one "@" in the address, since source routing using
route-address syntax is discouraged (and doesn't work on most implementations
anyway).  And the % precedence is recommended to be lower than any other
operator, including "!".

All this from section 5.2.16 on page 57.

^todd       "You want a standard?  Here's several, you can take your pick."