>Mail from one of our users continuously fails the MAILFROM test, but I'm 
>not sure that it should be failing.  The only funny thing this message has 
>is the mail server hostname appended to the end of the address, but I 
>thought that was valid.

No, it isn't valid:

>X-Note: Sent from [EMAIL PROTECTED]@mx.digical.com - 
>h-64-236-243-243.twi.com ([64.236.243.243]).

RFC821 doesn't say how to handle this -- the return address is 
"[EMAIL PROTECTED]@mx.digical.com", yet only 1 "@" is allowed 
in the address (technically, the part to the left of the "@" could have 
another one, if it was quoted, but that is rarely ever used).

There is an obscure routing method that is legal, and similar to this -- 
"[EMAIL PROTECTED]", where one mailserver would 
send it to mx.digical.com, which would then send it to 
[EMAIL PROTECTED]  However, you need a "%" in there for that 
to be valid.
                        -Scott

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