為什么80%的碼農都做不了架構師？>>> ??

421 ?Service not available, closing transmission channel (This may be a reply to any command if the service knows it must shut down)
450 ?Requested mail action not taken: mailbox unavailable (E.g., mailbox busy)
451 ?Requested action aborted: local error in processing
452 ?Requested action not taken: insufficient system storage
500 ?Syntax error, command unrecognized (This may include errors such as command line too long)
501 ?Syntax error in parameters or arguments
502 ?Command not implemented
503 ?Bad sequence of commands
504 ?Command parameter not implemented
550 ?Requested action not taken: mailbox unavailable (E.g., mailbox not found, no access)
551 ?User not local; please try
552 ?Requested mail action aborted: exceeded storage allocation
553 ?Requested action not taken: mailbox name not allowed (E.g., mailbox syntax incorrect)
554 ?Transaction failedThe other codes that provide you with helpful information about what’s happening with your messages are:
211 ?System status, or system help reply
214 ?Help message (Information on how to use the receiver or the meaning of a particular non-standard command; this reply is useful
only to the human user)
220 ?Service ready
221 ?Service closing transmission channel
250 ?Requested mail action okay, completed
251 ?User not local; will forward to
354 ?Start mail input; end with . (a dot)
‘*************************??
??‘*? ?郵件服務返回代碼含義??
??‘*? ?500? ?格式錯誤，命令不可識別（此錯誤也包括命令行過長）??
??‘*? ?501? ?參數格式錯誤??
??‘*? ?502? ?命令不可實現??
??‘*? ?503? ?錯誤的命令序列??
??‘*? ?504? ?命令參數不可實現??
??‘*? ?211? ?系統狀態或系統幫助響應??
??‘*? ?214? ?幫助信息??
??‘*? ?220? ???服務就緒??
??‘*? ?221? ???服務關閉傳輸信道??
??‘*? ?421? ???服務未就緒，關閉傳輸信道（當必須關閉時，此應答可以作為對任何命令的響應）??
??‘*? ?250? ?要求的郵件操作完成??
??‘*? ?251? ?用戶非本地，將轉發向??
??‘*? ?450? ?要求的郵件操作未完成，郵箱不可用（例如，郵箱忙）??
??‘*? ?550? ?要求的郵件操作未完成，郵箱不可用（例如，郵箱未找到，或不可訪問）??
??‘*? ?451? ?放棄要求的操作；處理過程中出錯??
??‘*? ?551? ?用戶非本地，請嘗試??
??‘*? ?452? ?系統存儲不足，要求的操作未執行??
??‘*? ?552? ?過量的存儲分配，要求的操作未執行??
??‘*? ?553? ?郵箱名不可用，要求的操作未執行（例如郵箱格式錯誤）??
??‘*? ?354? ?開始郵件輸入，以.結束??
??‘*? ?554? ?操作失敗??
??‘*? ?535? ?用戶驗證失敗??
??‘*? ?235? ?用戶驗證成功??
??‘*? ?334? ?等待用戶輸入驗證信息

轉載于:https://my.oschina.net/guyson/blog/117631

總結

以上是生活随笔為你收集整理的SMTP 错误代码大全的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。