/usr/bin/mailq
/usr/bin/mailq.exim
/usr/bin/newaliases
/usr/bin/newaliases.exim
/usr/bin/rmail
/usr/bin/rmail.exim
/usr/bin/rsmtp
/usr/bin/rsmtp.exim
/usr/bin/runq
/usr/bin/runq.exim
/usr/sbin/convert4r4
/usr/sbin/exicyclog
/usr/sbin/exigrep
/usr/sbin/exim
/usr/sbin/exim_checkaccess
/usr/sbin/exim_dbmbuild
/usr/sbin/exim_dumpdb
/usr/sbin/exim_fixdb
/usr/sbin/exim_lock
/usr/sbin/eximstats
/usr/sbin/exim_tidydb
/usr/sbin/exinext
/usr/sbin/exipick
/usr/sbin/exiqgrep
/usr/sbin/exiqsumm
/usr/sbin/exiwhat
/usr/sbin/sendmail
/usr/sbin/sendmail.exim
You may install this package on CentOS with
yum
install exim