Command to check DDOS on Server
September 7, 2026
We came across an issue where emails were not coming to server
on checking logs we saw below error
failed to open DB file /var/spool/exim/db/ratelimit: Permission denied (euid=47 egid=12)
We executed below steps to fix the error
1003 2020-05-20 11:38:14 rm -fv /var/spool/exim/db/*
1004 2020-05-20 11:38:30 service exim restart
1005 2020-05-20 11:39:22 chown -R mailnull.mail /var/spool/exim
1006 2020-05-20 11:40:19 chmod 0750 /var/spool/exim
1007 2020-05-20 11:40:25 /scripts/upcp –force