[Exim] SPAM problems : reject by X-Mailer?

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Autor: Rory Campbell-Lange
Data:  
Para: exim-users
Assunto: [Exim] SPAM problems : reject by X-Mailer?
I am using exim4 and exiscan.

I have seen a large increase in emails with subjects like "annoy idea
handsome" and bodies such as "peace euphorbia lillian scout b centerline
cleat scapular citron pacify centigrade icicle eh imperate cupid
fireplace gentlemen cocaine". Presumably the sender is trying to
generate a response?

Many of these spam senders have the following X-Mailer listed:
    X-Mailer: mPOP Web-Mail 2.19


Is this possible to generate an SMTP-time rejection of a message based
on its X-Mailer? Is this sensible?

Thanks,
Rory

--
Rory Campbell-Lange
<rory@???>
<www.campbell-lange.net>