Hello,

If you're receiving the following error in WHM>> Service Status option for exim service.

Error::
Main >> Server Status >> Service Status
Error:: exim rpmdb: PANIC: fatal region error
Solution::

[root@vps ~]#cd /var/lib/rpm
[root@vps ~]#ll __db.00*
[root@vps ~]#rm __db.00*
[root@vps ~]#rpm --rebuilddb
[root@vps ~]#yum clean all
This should solve your problem..