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    s23
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    Send email that needs authentification via telnet

    encode your username and password:

    echo -en "<username>\0<username>\0<secret_password>" | base64-encode
    0MKwtQ-1Dtkqj0oyz-00asfasdf
    

    then connect to your provider using the telnet command:

    telnet provider.com 25
    
    >>Trying 123.123.123.123...
    >>Connected to provider.com
    >>220 Welcome to Nemesis ESMTP server on smtp.1und1.de
    
    HELO <domain> or <user@domain> or <your email>
    
    >>250 mrelayeu2.provider.com pleased to meet you
    
    AUTH PLAIN <your base64-encoded usernam/password-combination as mentioned above>
    >>235 authentication finished successfully
    
    Mail From: <your@email-address>
    >>250 mail from: <your@email-adress> ok
    
    RCPT To: <the@recipient-adress>
    >>250 <the@wrecipient-adress> ok
    Data
    >>354 Enter mail, end with "." on a line by itself
    
    this is your message, if you wand to send one,
    GNAGNAGNA
    .
    >>250 Message 0MKwtQ-1Dtkqj0oyz-0006Hy accepted by mrelayeu2.provider.com
    
    quit
    >>221 Bye
    
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