Bounce Rules

[Matt Kettler]

    [ The following text is in the "ISO-8859-1" character set. ]
    [ Your display is set for the "US-ASCII" character set.  ]
    [ Some characters may be displayed incorrectly. ]

Dave Shariff Yadallee - System Administrator a.k.a. The Root of the Problem
> 
> 
> Then what about just making it undeliverable? 
> 

Only if you can do it *before* the end of the SMTP session. Otherwise an
undeliverable message will cause the MTA to generate a bounce, which is
ultimately the same thing as having mailscanner generate a bounce.


The problem isn't the semantics. It's the generation of a DSN message that will
be sent to an address your can be 99.9% sure isn't the author of the message.

(If the message really is spam, there is a 100% chance that both the
Return-Path: and the From: are forged. It's also likely they point to the
mailbox of someone completely innocent, possibly someone who has irritated the
spammer.)

The same applies to most email viruses. The "sender" of the message didn't send
it. It's pure forgery and you're just spamming someone uninvolved by bouncing a
message to them.


If this doesn't make sense to you, Read up on "joe jobs" and "backscatter" or
"blowback" and how they relate to spam and network abuse.

------------------------ MailScanner list ------------------------
To unsubscribe, email jiscmail at jiscmail.ac.uk with the words:
'leave mailscanner' in the body of the email.
Before posting, read the Wiki (http://wiki.mailscanner.info/) and
the archives (http://www.jiscmail.ac.uk/lists/mailscanner.html).

Support MailScanner development - buy the book off the website!