SMTP錯誤碼/具體原因

214 Help availble on http://www.naesasoft.com HELP
220 <domain> Service ready Client Open Connection
221 <domain> Good-bye QUIT
235 Authentication ok, go ahead AUTH 認證成功
250 Ok ALL
250 duplicated RCPT RCPT
250 All SMTP buffer cleared REST
251 User not local; will forward to <forward-path> VRFY
252 Cannot VRFY user, but will accept message and attempt VRFY
334 VXNlcm5hbWU6 AUTH LOGIN
期望用戶輸入用戶名，B64 "Username:"
334 UGFzc3dvcmQ6 AUTH
期望用戶輸入用戶名，B64 "Password:"
354 Start mail input; end with <CRLF>.<CRLF> DATA
421 <domain> Service not available OPEN
421 <domain> Service not available - Unable to chdir DATA
無法進入隊列目錄
421 <domain> Service not available - Unable to read system configuration OPEN
無法讀取SMTP配置或者沒有配置
421 <domain> Servcie not available - Unable to figure out my IP addresses OPEN
無法判斷SMTP自己的IP
421 <domain> Service not available - no valid hosted domain OPEN
系統沒有配置任何一個域
421 Too much failure in SMTP session ALL
在SMTP會話中發生太多錯誤
421 Access is denied from your IP <remote_ip> for audit reason, try later OPEN
動態拒絕遠端IP訪問
421 Refused. You have no reverse DNS entry
反向域名解析失敗
[root@ws01]:~># dig -x 211.95.77.58
; <<>> DiG 9.2.4 <<>> -x 211.95.77.58
;58.77.95.211.in-addr.arpa. IN PTR
[root@ws01]:~># dig -x 211.95.77.40
; <<>> DiG 9.2.4 <<>> -x 211.95.77.40
;; global options: printcmd
;40.77.95.211.in-addr.arpa. IN PTR
[root@ws01]:~># dig -x 211.95.77.41
;41.77.95.211.in-addr.arpa. IN PTR
[root@ws01]:~># dig -x 211.95.77.42
;42.77.95.211.in-addr.arpa. IN PTR
其實以前也發過給你，後來不知線路上有沒有問題，現在反相解析都沒有了。希望重新將我們上海聯通的四臺公網地址做一下反相解析。
211.95.77.58 ws01.133sh.com
211.95.77.40 ws02.133sh.com
211.95.77.41 ws03.133sh.com
211.95.77.42 ws04.133sh.com
上面是當時做反相時候給的具體主機地址，麻煩您幫我們重新審覈一下。謝謝！！！
421 421-: (DNS:NR) http://postmaster.info.aol.com/errors/421dnsnr.html421 SERVICE NOT AVAILABLE
解決方法：根據鏈接查看我們的ip是否被禁，如被禁申請解除
結果：此郵件中可能有某些關鍵字被GFW(Great Fire Wall的簡寫，意指"中國國家網絡防火牆"，這是國外媒體對"國家公共網絡監控系統"的俗稱。)中國反垃圾郵件過濾系統過濾掉了。
432 A password transition is needed AUTH
用戶密碼需要根據認證機制轉換
450 Requested mail action not taken
450 Mailbox <email_addr> is full RCPT、DATA
用戶郵箱滿
450 Recipient address rejected: Recipient is protected by Flow Control
這是因爲對方的服務器做了流量控制 並不是說發附件就收不到 而是因爲附件一般所需要的流量比較多所致。純文本的所付出的流量很少。
450 4.7.1 <[email protected]>: Recipient address rejected: Greylisted for 5 minutes
結果：對方服務器採用了灰名單技術，要驗證發件人身份，等待5分鐘發信 ，聯繫對方加入白名單
451 Requested action aborted: error in processing; DATA
451 Timeout ALL
數據讀寫超時
451 Message doesn't conform to the EMIME standard. DATA mail data
不符合rfc2821規範
451 Temporary internal failure - queue message failed DATA
信件入隊失敗
451 Temporary internal failure - database inaccessible OPEN、MAIL、RCPT
內部臨時錯誤-數據庫訪問故障
452 Temporary internal failure - out of memory ALL
內存分配錯誤
452 Temporary interanal failure - insufficient system storage
452 Temporary interanal failure - failed to resolve EHLO/HELO FQDN EHLO、HELO
客戶端域名A記錄(A RR)解析臨時錯誤
452 too many RCPTs RCPT 郵件人數目過多
453 Accee is denied - sender is in the audit blacklist, try later MAIL
發件人審計黑名單中，拒絕發送
500 syntax error - invalid character ALL
命令或參數中出現非法字符
500 syntax error - line too long ALL
命令或參數行過長
500 syntax error - command unrecognized
不能識別的命令
501 Remote abort the authentication AUTH
用戶發送*號取消認證操作
501 Syntax error in parameters or arguments ALL
命令參數錯誤，如地址不包含尖擴號、地址沒有域名
502 Command not implemented
該命令暫不支持
503 Bad sequence of commands
命令順序錯誤
503 Bad sequence of commands MAIL first RCPT、DATA
命令順序錯誤，期待命令MAIL
503 Bad sequence of commands RCPT first DATA
命令順序錯誤，期待命令RCPT
504 Command parameter not implemented ALL
命令參數不支持
504 Unrecognized authentication type
AUTH 認證機制不支持
521 Access is denied from your IP <remote_ip> OPEN、MAIL、RCPT
拒絕遠端IP訪問
530 Authentication required MAIL
需要進行認證
534 Authentication mechanism is too weak AUTH
認證機制過於簡單
538 Encryption required for requested authentication mechanism AUTH
客戶請求的認證機制需要加密
550 invalid user - <email_addr> MAIL、RCPT、VRFY、EXPN
無效用戶
550 invalid user - <email_addr> is disabled for payment reason MAIL、RCPT、VRFY、EXPN
因爲欠費用戶暫停
550 access denied to you OPEN、MAIL、RCPT、VRFY、EXPN
拒絕訪問
550 Access to Mailbox <email_addr> is denied RCPT、DATA
用戶郵箱拒絕訪問
550 #5.1.0 Address rejected [email protected] 。 放棄202.108.33.44。Host does not like recipient.
判斷：手工測試發現爲新浪的VIP郵箱收件人主機阻止我們發信，發送郵件至 [email protected]
550 Sender verify failed 。 放棄195.56.146.230。Host does not like recipient.
解決辦法：對方採用了反向解析技術，確認發信人身份，確認反向解析正確
550 read write time out
結果：隊列服務器郵件過多，服務器放棄投遞郵件
550 <[email protected]>... User unknown 。 放棄192.100.105.133。Host does not like recipient
解決方法：比對退信編碼表
結果：對方地址不正確或是地址不存在
550 username and mail from inconsistent
結果：由於寫郵件時格式不正確，導致產生退信。工程師手工測試正常。
551 User not local; please try <forward-path> RCPT、VRFY
非本地用戶，請嘗試發送到<forward-path>
551 User not local; please try I’m not going to try again; this message has been in the queue too long..”
出現以上錯誤信息的原因和所發郵件有沒有內容、內容大小等都沒有關係，是xx防火牆(GFW，又名“xx工程”)做了過濾的原因，它（xx工程）定義了大陸的IP連接到大陸以外（如香港、臺灣、歐洲等）
的郵件服務器是不可以自己發郵件給自己的！只要大陸所在客戶端用大陸的IP發送郵件，馬上就會提示“551 User not local; please try ”這樣的錯誤信息！
511 sorry, no mailbox here by that name (#5.1.1 - chkuser)
用戶不存在
551 User not local; please try <forward-path> 。 放棄212.227.15.134。Host does not like recipient.
結果： 經工程師查詢是此郵件中可能有某些關鍵字被GFW(Great Fire Wall的簡寫，意指"中國國家網絡防火牆"，這是國外媒體對"國家公共網絡監控系統"的俗稱。)中國反垃圾郵件過濾系統過濾掉了
552 message exceeds fixed maximum message size DATA mail data
數據過大，超過系統限制；特別是在SIZE擴展後
552 This user's disk quota exceeded, anyway you can send a smail (<1KB) message to inform the person. ?。 Host failed after I sent the message.
結果：552錯誤是這個用戶的磁盤配額超過了。用戶的附件或者容量已經起過使用了。可以發小點的附件或者郵件測試一下。
552 MS-Office file containing VBA macros found inside of the email
在郵件裡的OFFICE檔案內含vba巨集（建議用戶以壓縮包發送附件）或使用foxmail客戶端
553 Requested action not taken: mailbox name not allowed RCPT
用戶拒絕接收信件
553 Accee is denied - sender is in the blacklist MAIL、RCPT
發件人在黑名單中，拒絕發送
553 Accee is denied - please use the smtp server instead of MX MAIL
拒絕本地用戶使用MX服務器發信
554 Requested mail action aborted: exceeded storage allocation; too much mail data
554 too many hops, this message is looping DATA
信件中出現的Received過多，拒絕循環信件
554 no valid recipients DATA
沒有收件人，可能和錯誤順序有關
554 Authentication has failed too many times AUTH
認證失敗次數過多
554 Too many MAIL transactions in the same connection MAIL
在同一個SMTP連接中發信會話數目過多
554 Invalid EHLO/HELO FQDN host EHLO、HELO
客戶端域名A記錄(A RR)聲明錯誤
554 Relay from your IP <remote_ip> is denied RCPT
拒絕遠端IP做中繼轉發操作請求
554 Relay from your addr <revserse_address> is denied RCPT
拒絕來自發件人<reversed_address>的中繼轉發請求
554 Relay to <relay_address> is denied RCPT
中繼轉發的目的地址限制
554 RCPT <forward-address> is in the blacklist RCPT
收件人在黑名單中
554 Temporary authentication failure AUTH
認證失敗
554 Message is denied because it's infected by <virus name> DATA
信件內容含有病毒，病毒名<virus name>，拒絕接收
554 Message is denied by filter key <key> DATA
信件內容包含過濾關鍵字<key>，拒絕接收
554 Subject is denied by filter key <key> DATA
信件主題包含過濾關鍵字<key>，拒絕接收
554 <[email protected]>: Relay access denied 。
詢問客戶是否是用代理smtp服務器發送郵件的還是用我方的SMTP服務器發送的.
這個是正確的，退信原因是拒絕中繼轉發，導致退信．請用戶確認是否是用代理smtp服務器發送郵件的還是用我方的SMTP服務器發送的.