Send email that needs authentification via telnet

encode your username and password: echo -en " \0 \0" | 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 or  or

>>250 mrelayeu2.provider.com pleased to meet you

AUTH PLAIN  >>235 authentication finished successfully

Mail From:  >>250 mail from:  ok

RCPT To:  >>250  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