[Esd-l] Re: Suggested "Badtrans.B" recipe addition

[John D. Hardin]

On Tue, 27 Nov 2001, Brett Glass wrote:

> It'd be useful to filter messages in which the RFC 822 From: address 
> contains the envelope "From" address preceded by an underscore. This is a 
> hallmark of nearly all messages sent by the worm. Not being a Procmail 
> maven, I don't know how to write this recipe, though. John?

You'd add something like:

  * ^From:.*<_

but a review of today's catch indicates that might not be a good idea.
I trapped one that had passed through a YahooGroups mailing list, and
the From: header had been de-underbarred. The Content-Type header had
also been cleaned up.

--
 John Hardin KA7OHZ    ICQ#15735746    http://www.impsec.org/~jhardin/
 jhardin at impsec.org                       pgpk -a jhardin at wolfenet.com
  768: 0x41EA94F5 - A3 0C 5B C2 EF 0D 2C E5  E9 BF C8 33 A7 A9 CE 76 
 1024: 0xB8732E79 - 2D8C 34F4 6411 F507 136C  AF76 D822 E6E6 B873 2E79
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