SMTP reply code messages
This topic contains SMTP reply code messages.
451: Local error in processing
451: Pacing problem detected by server
500: Command Line too long
500: Unknown command, command
501: Syntax Error. <CR> and <LF> not permitted in Quoted Text
501: Syntax Error. message
501: Syntax Error. address expected
501: Syntax Error. address must be in range 0..255
501: Syntax Error. address too long
501: Syntax Error. ‘.’ expected
501: Syntax Error. ‘[’ expected in PathName
501: Syntax Error. ‘:’ Expected in Path Name
501: Syntax Error. ‘@’ expected
501: Syntax Error. ‘@’ Expected in Source Route
501: Syntax Error. ‘”’ expected
501: Syntax Error. Domain name cannot end with ‘-’
501: Syntax Error. Domain name missing
501: Syntax Error. Domain name too long
501: Syntax Error. Incomplete Address
501: Syntax Error. Incomplete Address
501: Syntax Error. Invalid LocalPart of Address
501: Syntax Error. Invalid Path Specification
501: Syntax Error. Missing Domain Name
501: Syntax Error. Missing host name, ‘@’ expected
501: Syntax Error. Missing User name
501: Syntax Error. Must use MAIL FROM:
501: Syntax Error. Must use RCPT TO:
501: Syntax Error. Must use VERB ON or VERB OFF
501: Syntax Error. Need args after MAIL command
501: Syntax Error. Need args after RCPT command
501: Syntax Error. Need args after command command
501: Syntax Error. Need args after TICK command
501: Syntax Error. Need args after VERB command
501: Syntax Error. No Args after command command
501: Syntax Error. Null Recipient Invalid
501: Syntax Error. Number Expected
501: Syntax Error. Only ListId or Userid allowed as argument to this command
501: Syntax Error. Path too long
501: Syntax Error. Quoted text is a null string
501: Syntax Error. Special chars only with Escape Char
501: Syntax Error. Start Domain with a…z, A…Z, or 0…9
501: Syntax Error. Start Path name with ‘<’
501: Syntax Error. Unexpected end of Domain Name
501: Syntax Error. Unexpected Token result
501: Syntax Error. Unterminated Quoted String
502: Command smtp_command not implemented
503: HELO must be first command in session
503: No Recipients specified
503: No Sender specified
503: Sender already specified
503: Sender must be specified before recipients
504: HELP topic unknown
522: Too many recipients
550: Cannot accept mail for this host; MX records will cause loop.
550: Cannot accept mail for this host; Next MX site not defined.
550: Cannot accept mail IPMAILERNAME will cause loop.
550: Host host Unknown
550: Mail forwarding not supported
550: Mailing list mailinglist Nonexistent 550 MailBox mailbox Nonexistent
550: Service denied due to user supplied exit.
550: Source routing not permitted in gateway
550: Spool File Origin: userid@nodeid does not match Sender’s Address: path
550: Unable to find A records for any MX sites for the recipient host.
550: Unable to resolve recipient address for days days.
550: User name Unknown
550: User userid@nodeid on Restricted List
550: User RSCSUser@RSCSHost is not a registered gateway user
552: Mail file too large
552: Too many recipients
Parent topic:
TCP⁄IP codes