sudo apt-get install exim4

Configure Exim with the following command:

sudo dpkg-reconfigure exim4-config Press the down-arrow key to select mail sent by smarthost; received via SMTP or fetchmail then press Tab, followed by Enter:

• # This is a Debian specific file
• dc_eximconfig_configtype='internet'
• dc_other_hostnames='*.mx.bdcom.net;bdcom.net'
• dc_local_interfaces='127.0.0.1 ;210.4.77.139; ::1'
• dc_readhost= * dc_relay_domains='mx2.bdcom.net' * dc_minimaldns='false' * dc_relay_nets='210.4.64.0/20;119.40.80.0/20;103.16.72.0/22;113.11.0.0/17;114.31.0.0/19;2403:4000::/32 202.79.19.41/32' * dc_smarthost='mx.bdcom.net' * CFILEMODE='644' * dc_use_split_config='false' * dc_hide_mailname='false' * dc_mailname_in_oh='true' * dc_localdelivery='mail_spool' * message_size_limit='6M' aptitude install alpine alpine -f /var/spool/mail/system apt-get install dovecot-core apt-get install dovecot-imapd apt-get install dovecot-pop3d service dovecot start''

• root@mx2:~$ telnet localhost pop3
• Trying localhost…
• Connected to localhost.
• Escape character is '^]'.
• +OK dovecot ready.