Install Poppassd in CentOS 7

Steps for configuration change password plugin for squirrelmail/Horde/Rainloop using poppassd are:

Download poppassd.c from https://netwinsite.com/poppassd/

Look at poppassd.c and make sure it looks safe

yum -y install gcc
gcc poppassd.c -o poppassd -lcrypt
mv poppassd /usr/local/bin/
yum -y install xinetd
cp /etc/xinetd.d/time-stream /etc/xinetd.d/poppassd

nano /etc/xinetd.d/poppassd Update “service time” to “service poppassd”

disable = no
id = poppasswd
type = UNLISTED
user = root
group = root
server = /usr/local/bin/poppassd
port = 106

systemctl restart xinetd
systemctl enable xinetd

Test by doing “telnet localhost 106” that service is started properly or not.

Your poppassd is now installed on Centos 7 system.

Src: https://www.sbarjatiya.com/notes_wiki/index.php/CentOS_7.x_Configure_change_password_plugin_for_squirrelmail_using_poppassd