Email Errors

 

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SMTP Server Response / Error Codes

211 A system status message.
214 A help message for a human reader follows.
220 Service ready.
221 Service closing.
250 Requested action taken and completed. The best message of them all.
251 The recipient is not local to the server, but it will accept and forward the message.
252 The recipient cannot be VRFYed, but the server accepts the message and attempts delivery.
   
354 Start message input and end with <CRLF>.<CRLF>. This indicates that the server is ready to accept the message itself.
421 The service is not available and the connection will be closed.
450 The requested command failed because the user's mailbox was unavailable (for example since it was locked).
451 The command has been aborted due to a server error. Not your fault.
452 The command has been aborted because the server has insufficient system storage.
   
500 The server could not recognize the command due to a syntax error.
501 A syntax error was encountered in command arguments.
502 This command is not implemented.
503 The server has encountered a bad sequence of commands.
504 A command parameter is not implemented.
550 The requested command failed because the user's mailbox was unavailable (for example because it was not found, or because the command was rejected for policy reasons).
551 The recipient is not local to the server. The server then gives a forward address to try.
552 The action was aborted due to exceeded storage allocation.
553 The command was aborted because the mailbox name is invalid.
554 The transaction failed.

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