Lorsque vous envoyez des mails, le serveur de destination renvoi un code pour dire si tout est ok … ou pas.
Dans le cas où ce serait non, voici à quoi correspond les chiffres :
LE PREMIER CHIFFRE ……………………………………………………………………………….
il indique si le serveur distant à accepté votre message ou pas :
- 1: The server has accepted the command, but does not yet take action. A confirmation message is required. Currently, this is not used.
- 2: The server has completed the task successfully.
- 3: The server has understood the request, but requires further information to complete it.
- 4: The server has encountered a temporary failure. If the command is repeated without any change, it might be completed. Mail servers can use such temporary failures to keep untrusted senders at bay.
- 5: The server has encountered an error.
LE DEUXIEME CHIFFRE ……………………………………………………………………………..
donne plus d’explication, en rapport avec le 1er chiffre :
- 0: A syntax error has occurred.
- 1: Indicates a informational reply, for example to a HELP request.
- 2: Refers to the connection status.
- 3 and 4 are unspecified.
- 5: Refers to the status of the mail system as a whole and the mail server in particular.
LES CHIFFRES SUIVANTS …………………………………………………………………………..
donne encore plus précision (plus de granularité) relatif à la RFC 821 :
- 211 – A system status message.
- 214 – A help message for a human reader follows.
- 220 – SMTP 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 the server 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 (after you have told it who it is from and where you want to to go).
- 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 because it was locked). Try again later.
- 451 – The command has been aborted due to a server error. Not your fault. Maybe let the admin know.
- 452 – The command has been aborted because the server has insufficient system storage.
- The following error messages (500-504) usually tell you that your email client is broken. It’s probably best to let the program’s author know.
- 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. Blame it on the weather.
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