----- Original Message ----- 
From: "Jesse Guardiani" <[EMAIL PROTECTED]>
>
> I have written (and currently use in production) a python script
> designed to block email addresses and/or domains using a flat file/auto
> generated CDB file.
>
> It differs from the badmailfrom file in that it:
>
> 1.) Uses a CDB database for bad from address lookups
> 2.) Checks the envelope sender address of the incoming email (like
>     traditional badmailfrom), AND blocks based on the email header's
>     from address.
>
> The script is very efficient (for an interpretted script) and fast.
> It's also well tested at this point, and relatively bug-free. It
> runs under qmail-qfilter (a C wrapper for QMAILQUEUE scripts).
>
> Let me know if you're interested.

Jesse,

Sorry for sounding like a dummy but can you explain point # 2 for me?  The
envelope sender is what a user sees in their email client right?  So your
script compares that to the email in the header right?  I'm not sure I
understand why that is effective?  Does a spammer not just set them both the
same?  Am I correct in saying that the email headers from address is
populated from the envelope sender?

I'm confused :)
Thanks
Malcolm



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