Un peu dans le même style que swaks, voici sendemail

sudo apt-get install sendemail

Synopsis: sendEmail -f ADDRESS [options]

Required:
-f ADDRESS from (sender) email address

  • At least one recipient required via -t, -cc, or -bcc

  • Message body required via -m, STDIN, or -o message-file=FILE

    Common:
    -t ADDRESS [ADDR …] to email address(es)
    -u SUBJECT message subject
    -m MESSAGE message body
    -s SERVER[:PORT] smtp mail relay, default is localhost:25

    Optional:
    -a FILE [FILE …] file attachment(s)
    -cc ADDRESS [ADDR …] cc email address(es)
    -bcc ADDRESS [ADDR …] bcc email address(es)

Pour modifier certaines valeurs (Message-ID, delimiter, X-Mailer…) le script /usr/bin/sendEmail est très simplement éditable.