I have upgraded the kernels on Centos6, Mail, Mx1, Mx2, Radius1, and Scientific from 2.6.32 to 3.10.107 to eliminate a vulnerability being exploited by some Linux Ransomware making the rounds presently.

     I initially upgraded to 4.11.8 but discovered that pine and dovecot do not work properly with this kernel version under RHEL-6 based machines.  It does work fine under Ubuntu so I don’t know if it is an incompatibility of how some library interfaces with the kernel or exactly what is wrong, I just know it does not work properly but 3.10.107 does seem to be okay.