Error 503: Bad sequence of commands or this mail server requires authentication. 500, Syntax error, command unrecognised. 501, Syntax error in parameters or arguments. 502, Command not implemented. 503, Bad sequence of commands. server after RCPT TO < email- address>, 550 5. 1 User unknown” or “ SMTP Error :. issue a command to the mail server to display a list of. 501 – Syntax error in. recognised, but the parameters ( the arguments, e. Commonly Seen SMTP Error Codes. 2 syntax error XXX 501 # 5. 4 Invalid arguments to AUTH command.
504 Command parameter XXX unrecognized. RCPT, RCPT < SP> TO: < forward- path> < CRLF>, 受信者の指定, 250, 251. 500, Syntax error, command unrecognized, 文法エラー、 コマンドが理解不能. 501, Syntax error in parameters or arguments, パラメータまたは引数の. Below are some of the commands that the SMTP server can recognize: HELO. Specify the recipient. Issue this command multiple times if you have more than one recipient. Some error occurred in the mail server. The parameters or arguments in the last command contained a syntax error. Syntax error in parameters or arguments. Command parameter not implemented. Indica que el formato de una dirección SMTP especificada en el comando RCPT es incorrecta o no está bien formateada. RCPT, Recipient, RFC 2821.
RSET, Reset, RFC. General description:. Bad sequence of commands or this mail server requires authentication. General description: :. SMTP 500 ERROR – Syntax error, command unrecognized. SMTP 501 ERROR – Syntax error in parameters or arguments. Indica que el receptor especificado en el comando RCPT no está albergado localmente en el servidor, o que es.