Historically, you used to be able to send an e-mail address
and specify the path it went by replacing the @ sign with a %
and appending the server you wanted it to go through.
This was useful in reaching bitnet addresses because
there were only a few bitnet gateways.

So, if you had an address like [EMAIL PROTECTED] and wanted
it to go through the bitnet gateway at nyu.edu you'd format
the address like this:

[EMAIL PROTECTED]

Once it got to nyu.edu, they'd take "lovelace%bitnet",
rewrite it to be "[EMAIL PROTECTED]" and send it to the bitnet
network.

However, since bitnet and other fringe networks have
pretty much gone away and everything is connected,
this hack is pretty much died out and, in fact, I would
probably consider any MTA implementing it a security
risk.

Cheers,
Tanner

On 1/12/07, Matt Frye <[EMAIL PROTECTED]> wrote:
I'm getting "550 Forwarding percent hack is not permitted" and not
finding much documentation about this error.  It occurs when I send an
email to an account I know exists from another valid account, but
don't get the message when I send from a different account to the same
domain (different user).  From what I know of the receiving
organization, it could be someone trying to configure something and
not getting it quite right.  Anyone have experience with this error?

--
Matt Frye
http://www.linkedin.com/in/mattfrye
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--
Tanner Lovelace
clubjuggler at gmail dot com
http://wtl.wayfarer.org/
(fieldless) In fess two roundels in pale, a billet fesswise and an
increscent, all sable.
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