— Check chkservd logs (
/var/log/chkservd.log ) and see if we can find something
like this in-relation to exim
>> AUTH PLAIN AF9fsdsdxcxcxcX19pspdivxc1k1MGJYek44eXpOMVliWkdOdF
<< 421 host.xxxx.com Service not available - closing connection exim: ** [421 host.xxxx.com: Service not available - closing connection != 2]
-- This shows that the check daemon failed to authenticate
with the temporal auth key (exim ) and therefore check is getting
-- As a result of this, we can find lots of SMTP authentication failures
in exim_mainlog ( both from valid and invalid IP's )
-- To fix this issue with exim-auth key, we need to generate them.
-- # cd /var/cpanel/serviceauth/
# rm -rf exim
# service cpanel restart
# service exim restart
Monitor chkservd logs (
/var/log/chkservd.log ) and make sure things are fine !