sudo aptitude install postfix postfix-tls libsasl2 libsasl2-modules sasl2-bin
cd /etc/postfix && postmap sasl_password && postmap usar_tls && invoke-rc.d postfix restart && cat /etc/postfix/main.cf | mail -s "$(date)" ${EMAIL}

• http://kiriboum.net/1/doc/users/mbet/notes/deb_send_mail_postfix/

postdrop: fatal: getrlimit: Operation not permitted
send-mail: warning: command "/usr/sbin/postdrop -r" exited with status 1
send-mail: fatal: rzr(95924): unable to execute /usr/sbin/postdrop -r: Success
Can't send mail: sendmail process failed with error code 75

http://bugs.debian.org/626928# PostFix

mailq
(...) (unknown mail transport error)

sudo dpkg-reconfigure postfix

Purge Emails:

sudo mailq && sudo postsuper -d ALL

@TaG: SmtP