To configure fetchmail (I hope you know that it is used to download mails from remote server to localsystem), create file named ‘.fetchmailrc’ in home directory and add the following line to it.
poll [server ip address] with proto [server type] user [username]
for example:
poll 192.168.36.200 with proto pop3 user pavan_sv
in case of the user ‘pavan_sv’ on a remote pop3 server 192.168.36.200.