David U. wrote:
>Do we know how DJB filtered this client MUA?
>
>I think it'd be interesting to see how he choose to do it since I think
>there is more then one way.
Here's one quick and dirty way, usable in default delivery instructions or
in a .qmail file:
|bouncesaying "Outlook Express not welcome here." grep "X-Mailer: Microsoft
Outlook Express"
Of course, this will also reject messages that happen to have "X-Mailier:
Microsoft Outlook Express" in the message body (like this one). A better
method would use the 822field program in DJB's mess822 package.
---Kris Kelley
