Ok, I am just a beginner with Exim acls and filters but
yes, we can drop and also 'remember' those that send
such junk repeatedly -- some requires external programs
or scripts, but we can do it.
Now, I am just starting to pursue such automation so
the following includes a FEW references that I have
discovered in a very short search...
Exim 4: ACL to reject spams
Pasted from <
http://www.maretmanu.org/homepage/inform/exim-spam.html>
Stopping Spam in the ACL
Pasted from <
http://vamos-wentworth.org/exim-tricks.html>
Blocking spam (some scripts too)
Pasted from <
http://wizzy.org.za/article/articleview/20/1/2/>
Spam filtering with Exim
Pasted from <
http://www.sput.nl/software/exim.html>
spfilter current 0.59 (etc.)
Pasted from <
http://spfilter.sourceforge.net/>
Unix Server Spam Filter Applications (lots)
Pasted from <
http://spamlinks.net/filter-server-unix.htm>
Mail Filtering (exim)
Pasted from <
http://www.harkness.co.uk/exim/mail_filtering.html>
Using Exim to Prevent Spam
Pasted from <
http://www.pookey.co.uk/exim-spam.xml>
How to make your Debian machine an amazing Exim 4 mail filter
Pasted from <
http://www.wlug.org.nz/EximMailFilter>
Stop Spam At The Server with Exim RBL
Pasted from <
http://www.webhostgear.com/175_print.html>
Spam Filtering for Mail Exchangers: How to reject junk mail in incoming SMTP
transactions. Appendix A. Exim Implementation
Pasted from <
http://slett.net/spam-filtering-for-mx/exim.html>
Adding Greylisting Support
Pasted from <
http://slett.net/spam-filtering-for-mx/exim-greylisting.html>
Exim Dictionary Attack ACL for cPanel
Pasted from <
http://www.configserver.com/free/eximdeny.html>
Exim4: HOWTO beef up your Exim ACL Rules. Dctionnary attack rules, no RBL
lookups, Blacklist of envelope senders
Pasted from <
http://www.resellerhostingbox.com/article59.html>