Package: rss2email

"rss2email" package binaries on CentOS:

/usr/bin/r2e

You may install this package on CentOS with yum install rss2email

"rss2email" package binaries on Debian:

/usr/bin/r2e /usr/bin/r2e-migrate

You may install this package on Debian with apt-get install rss2email