Package: procmail

"procmail" package binaries on CentOS:

/usr/bin/formail /usr/bin/lockfile /usr/bin/mailstat /usr/bin/procmail

You may install this package on CentOS with yum install procmail

"procmail" package binaries on Debian:

/usr/bin/formail /usr/bin/lockfile /usr/bin/mailstat /usr/bin/procmail

You may install this package on Debian with apt-get install procmail