DynDNS and the ddclient

https://www.dyndns.com/support/clients/unix.html

In the ddclient.conf file I have:
###=============
daemon=300 #300 # check every 300 seconds
syslog=yes # log update msgs to syslog
mail=acardh #mail=root # mail all msgs to root
mail-failure=acardh #root # mail failed update msgs to root
pid=/var/run/ddclient.pid # record PID in file.
#ssl=yes # use ssl-support. Works with
# ssl-library
use=web
protocol=dyndns2
server=members.dyndns.org
login=acardh # default login
password=******** # default password
server=members.dyndns.org, protocol=dyndns2, acardh.homelinux.org
##===============================

My complete ddclient.conf is here (restricted access).