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telnet x.x.x.x 25 ehlo aaa mail from: <aaa@aaa.aa> rcpt to: <bbb@bbb.bb> data Subject: yyy msessage text . quit
telnet x.x.x.x 25 ehlo aaa AUTH PLAIN AGptczFAam1zMS5uZXQAbm90Lm15LnJlYWwucGFzc3dvcmQ= mail from: <aaa@aaa.aa> rcpt to: <bbb@bbb.bb> data Subject: yyy msessage text . quit