Exim SMTP Fails to send the email and gives following error log in /var/log/exim_mainlog

Email delivery error
1 Can't execute command '/usr/local/cpanel/bin/sendmail_cpanel -i -t -test@domain.com'.
This is malfunction in the exim mail server. The exim update solves this issue.

Update exim with command

/scripts/eximup --force
before updating check if /etc/exim.conf is not protected using attribues.