[Protocol][SMTP] 메일 프로토콜 Telnet Command별 메시지

[명령어 종합] "AUTH Authentication service\n [initial-response] \n\t mechanism = a string identifying a SASL authentication mechanism,\n\t an optional base64-encoded response" DATA Following text is collected as the message.\nEnd data with . EHLO Introduce yourself.", " EXPN The expn command. HELO Introduce yourself. HELP The HELP command gives help info about the..