5XX you must be spam
5XX Your envelope sender is enlisted as spammer
500 Syntax error, command unrecognized
500 File Sending Error
501 Denied domain name
501 Bad sender address expression
501 Argument missing
501 5.1.8 Sender domain must exist <xxx.com>
503 Bad sequence of commands
504 You are registered as spammer
504 We do not accept mail from spammers. if you have questions,please Email
511 sorry, no mailbox here by that name (#5.1.1 - chkuser)
550 No inbox for <E-mail Address>
550 User unknown
550 Requested action not taken: mailbox unavailable
550 5.1.1 Suspended mailbox
550 5.1.1 No such user <E-mail Address>
550 Invalid recipient
550 5.0.0 Access denied
553 sorry, that domain isn't in my list of allowed rcpt hosts
550 Relay rejected for <E-Mail Address>
550 relaying to <E-Mail Address> prohibited by administrator
553 Too many recipients
553 sorry, your envelope sender is in my badmailfrom list.
553 sorry, your envelope sender is enlisted as spammer
550 5.0.0 Your message may contain the Klez.worm! See http://securityresponse.symantec.com/avcenter/venc/data/w32.klez.removal.tool.html
553 5.0.0 Your message may contain the Win32.Klez worm!!- If you have questions,please email
553 5.5.4 Host name (xxx.com) is not match with your ip(xxx.xxx.xxx.xxx), maybe it's bogus. Visit http://antispam.hanmail.net
553 5.5.4 <xxx> ... Domain name required for sender address <xxx>
554 5.3.4 Too big mail sent. Max allowed mail size is xxxxxxxxx bytes
554 5.3.0 Mail have traversed Too many hops. Reject it
554 delivery error: dd Sorry, your message to <E-Mail Address> cannot be delivered. This account is over quota
554 5.1.0 Sender Denied
554 5.5.0 Your message was rejected. Please refer to http://antispam.nate.com/554-550.html [Reject Option]
554 delivery error: dd This user doesn't have a yahoo.com account (E-Mail Address) [-5] - mta114.mail.sc5.yahoo.com
550 5.7.1 <E-Mail Address>. Relaying denied. IP name lookup failed <IP Address>
550 5.5.0 VIRUS detected from your mail. Cure & Try again. Found by virus scan engine.
550 Denied by policy: Sender is listed on DNS-based RBL
550 Mail sender unuses allowed IP. SMTP Proxy Server close ...
553 5.5.3 <E-Mail Address>... Invalid
557 you must be virus
※ 메일 송,수신 중 위에 등록되지 않은 에러코드가 발생한 경우 에러코드 내용을 Ts@enage.com 으로 보내주시기 바랍니다.