$ python SendmailViaSMTP.py -h
Usage: python SendmailViaSMTP.py [--host=smtp.yourdomain.com] <--port=110> [--user=smtpaccount] [--password=smtppass] <--subject=subject> [--file=filename]|[--content=mailbody] [--from=sender] [--to=reciver].

    example:
    1. echo "blablabla" | python SendmailViaSMTP.py --host="mail.domain.com" --from="myname@yourdomain.com" --to="friends1@domain1.com;friends2@domain.com" --user="myname@yourdomain.com" --password="p4word" --subject="mail title"
    2. python SendmailViaSMTP.py --host="mail.domain.com" --from="myname@yourdomain.com" --to="friends1@domain1.com;friends2@domain.com" --user="myname@yourdomain.com" --password="p4word" --subject="mail title" --file=/path/of/file
    3. python SendmailViaSMTP.py --host="mail.yourdomain.com" --from="myname@yourdomain.com" --to="friends1@domain1.com;friends2@domain2.com;friends3@domain3.com" --user="myname@yourdomain.com" --password="p4word" -s "Hello from MailViaSMTP" -c "This is a mail just for testing."

    The priority of three content inputing method is: piped-data, --file, --content.

This is a command line kit for sending mail via smtp server which can use in
multiple platforms like linux, BSD, Windows etc.     This little kit was
written by leopku#qq.com using python.     The minimum version of python
required was 2.3.

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -a ATTACH, --attach=ATTACH
                        Specifies a file as attachment to be attached. Can be
                        specified more than once.
  -s SUBJECT, --subject=SUBJECT
                        The subject of the mail.
  -c CONTENT, --content=CONTENT
                        option mode. Mail body should be passed through this
                        option. Note: this option should be ignored while
                        working with piped-data or --file option.
  -f my@domain.com, --from=my@domain.com
                        Set envelope from address. If --user option is not
                        empty, commonly this option should be equaled with
                        --user options. Otherwize, the authoration of the smtp
                        server should be failed.
  -t friend@domain2.com, --to=friend@domain2.com
                        Set recipient address. Use semicolon to seperate multi
                        recipient, for example: "a@a.com;b@b.com."
  -F FILE, --file=FILE  File mode. Read mail body from file. NOTE: this option
                        should be ignored while working with piped-data.
  --host=smtp.domain.com
                        SMTP server host name or ip. Like "smtp.gmail.com"
                        through GMail(tm) or "192.168.0.99" through your own
                        smtp server.
  -P PORT, --port=PORT  SMTP server port number. Default is 25.
  -u my@domain.com, --user=my@domain.com
                        The username for SMTP server authorcation. Left this
                        option empty for non-auth smtp server.
  -p PASSWORD, --password=PASSWORD
                        The password for SMTP server authorcation. NOTE: if
                        --user option is empty, this option will be ignored.
  --tls                 Using tls to communicate with SMTP server. Default is
                        false. NOTE: if --host option equals "smtp.gmail.com",
                        this option becomes defaults true.
  --log=LOG             specify --log=DEBUG or --log=debug, more info see
                        document for logging module.