I am after some advice. Several of my users are receiving emails with cryptolocker in them and one even clicked on the link encrypting her entire computer. I have Operating system Ubuntu Linux 14.04.2, Webmin version 1.770, Virtualmin version 4.18.gpl, Postfix Mail Server, SpamAssassin Mail Filter and Procmail Mail Filter.
Should the email system detect cryptolocker?
Are the some changes I can make to improve the detection?