Manpage of POSTCONF
... Warning: with concurrency of 1, one bad message can be enough to block all mail to a site. invalid_hostname_reject_code (default: 501) The numerical Postfix SMTP server response ... SMTP RCPT TO command, and for receiving the server response ...

128kb.com / linux manual
... Warning: with concurrency of 1, one bad message can be enough to block all mail to a site. invalid_hostname_reject_code (default : 501) The numerical Postfix SMTP server response ... SMTP RCPT TO command, and for receiv- ing the server response ...

Internet Linux Servers - How To Set Up and Configure A Linux Web ...
... Web server with PHP support, Linux Sendmail e-mail server, and ... Sender OK rcpt to: root ... 501 - Syntax error in parameters or arguments. 502 - Command not implemented (valid SMTP command but not ...

MDaemon's Primary Features. Versatile Email Server for Windows ...
... checked during the SMTP MAIL FROM: command ... connects to your SMTP server and states, "MAIL ... that is sent in response to a "domain not found" result to be 501 (syntax error in parameters or arguments ...

Brawijaya Electronic Books ::
... 501: The parameters or arguments in the last command contained a syntax error. 502: The mail server ... RCPT command. If the recipient is not known to the mail server, the response ... parameters were true. Send the smtp command to the mail server. Get the mail server's response.

man: fetchmail
... RCPT TO lines shipped to SMTP. The name of the SMTP server ... mail from the server(s). Error mes- sages for command ... 501 "Syntax error in parameters or arguments". The postfix MTA runs 554 as an antispam response ...

CVE (version 20040901)
... root privileges via SMTP by specifying an improper "mail from" address and an invalid "rcpt ... mountd generates error ... overflow in the Mail-Max SMTP server for Windows systems allows remote command ...

CVE (version 20040901)
... root privileges via SMTP by specifying an improper "mail from" address and an invalid "rcpt ... mountd generates error ... overflow in the Mail-Max SMTP server for Windows systems allows remote command ...

Zend / Mailing lists
... type hinting - error hard to track down 32435 Open Add '-run' option to php command ... FTP server reports 501 wrong number of parameters 35079 ... Sent incorrect RCPT TO commands to SMTP server ...