SMTP Fehlercodes

SMTP Error Codes List


Was ist das SMTP-Protokoll?

SMTP steht für „Simple Mail Transfer Protocol“, was sich mit „Einfaches E-Mail-Transferprotokoll“ übersetzen lässt. Es handelt sich dabei um ein verbindungsorientiertes, textbasiertes Netzwerkprotokoll aus der Internetprotokollfamilie und ist als solches auf der siebten Schicht des OSI-Modells, der Anwendungsschicht, angesiedelt. Genauso wie jedes andere Netzprotokoll enthält es Regeln für die korrekte Kommunikation zwischen Computern in einem Netzwerk. Dabei ist SMTP speziell für das Einspeisen und Weiterleiten von E-Mails von einem Absender zu einem Empfänger zuständig.

SMTP Error Codes List

SMTP Error Codes List

Hier ein paar Listen zur Übersetzung von einfachen und erweiterten SMTP-Fehlern. Mit der Zeit werde ich die Listen erweitern.

Einfache SMTP Fehler Codes

CodeDescriptionCode Status
101The server is unable to connectInformational
111Connection refused or inability to open an SMTP streamInformational
211System status, or system help replySuccess
214Help/Info message; Intended for the human userSuccess
220Service readySuccess
221Service closing transmission channelSuccess
250Requested mail action completedSuccess
251User not local; message will be forwardedSuccess
252Cannot verify user, but will accept message and attempt deliverySuccess
354Start mail input; The server expects the e-mail bodyRedirection
420Timeout connection problemPersistent transient failure
421Service not available, closing transmission channel; When the server is shutting downPersistent transient failure
422The recipient’s mailbox has exceeded its storage limitPersistent transient failure
431Not enough space on the diskPersistent transient failure
432Recipient’s incoming mail queue has been stoppedPersistent transient failure
441The recipient’s server is not respondingPersistent transient failure
442The connection was dropped during the transmissionPersistent transient failure
446The maximum hop count was exceeded for the messagePersistent transient failure
447Message timed out because of issues concerning the incoming serverPersistent transient failure
449Routing errorPersistent transient failure
450Requested mail action not taken: mailbox unavailable (e.g., mailbox busy or temporarily blocked for policy reasons)Persistent transient failure
451Requested action aborted: error in processingPersistent transient failure
452Requested action not taken: insufficient system storagePersistent transient failure
455Server unable to accommodate parametersPersistent transient failure
471An error of your mail serverPersistent transient failure
500Syntax error, command unrecognized (This may include errors such as command line too long)Permanent errors
501Syntax error in parameters or argumentsPermanent errors
502Command not implementedPermanent errors
503Bad sequence of commandsPermanent errors
504Command parameter not implementedPermanent errors
510Bad email addressPermanent errors
511Bad email addressPermanent errors
512Host server for the recipient’s domain name cannot be found in DNSPermanent errors
513Address type is incorrectPermanent errors
523Size of your mail exceeds the server limitsPermanent errors
530Authentication problemPermanent errors
541The recipient address rejected your messagePermanent errors
550Requested action not taken: mailbox unavailable (e.g., mailbox not found, no access, or command rejected for policy reasons)Permanent errors
551User not local; The server will not forwardPermanent errors
552Requested mail action aborted: exceeded storage allocationPermanent errors
553Requested action not taken: mailbox name not allowed (e.g., mailbox syntax incorrect)Permanent errors
554Transaction failed (Or, in the case of a connection-opening response, “No SMTP service here”)Permanent errors
555MAIL FROM/RCPT TO parameters not recognized or not implementedPermanent errors

Erweiterte SMTP Fehler Codes

CodeDescriptionCode Status
X.1.0Other address statusAddress status
X.1.1Bad destination mailbox addressAddress status
X.1.2Bad destination system addressAddress status
X.1.3 Bad destination mailbox address syntaxAddress status
X.1.4Destination mailbox address ambiguousAddress status
X.1.5Destination mailbox address validAddress status
X.1.6Mailbox has movedAddress status
X.1.7Bad sender’s mailbox address syntaxAddress status
X.1.8Bad sender’s system addressAddress status
X.2.0Other or undefined mailbox statusMailbox Status
X.2.1Mailbox disabled, not accepting messagesMailbox Status
X.2.2Mailbox fullMailbox Status
X.2.3Message length exceeds administrative limitMailbox Status
X.2.4Mailing list expansion issueMailbox Status
X.3.0Other or undefined mail system statusMail System Status
X.3.1Mail system fullMail System Status
X.3.2System not accepting network messagesMail System Status
X.3.3System not capable of selected featuresMail System Status
X.3.4Message too big for systemMail System Status
X.3.5System incorrectly configuredMail System Status
X.4.0Other or undefined network or routing statusNetwork and routing status
X.4.1No answer from hostNetwork and routing status
X.4.2Bad connectionNetwork and routing status
X.4.3Routing server failureNetwork and routing status
X.4.4Unable to routeNetwork and routing status
X.4.5Network congestionNetwork and routing status
X.4.6Routing loop detectedNetwork and routing status
X.4.7Delivery time expiredNetwork and routing status
X.5.0Other or undefined protocol statusMail Delivery Protocol status
X.5.1Invalid commandMail Delivery Protocol status
X.5.2Syntax errorMail Delivery Protocol status
X.5.3Too many recipientsMail Delivery Protocol status
X.5.4Invalid command argumentsMail Delivery Protocol status
X.5.5Wrong protocol versionMail Delivery Protocol status
X.6.0Other or undefined media errorFormat or mail content status
X.6.1Media not supportedFormat or mail content status
X.6.2Conversion required and prohibitedFormat or mail content status
X.6.3Conversion required but not supportedFormat or mail content status
X.6.4Conversion with loss performedFormat or mail content status
X.6.5Conversion failedFormat or mail content status
X.7.0Other or undefined security statusPolicy or Security status
X.7.1Delivery not authorized, message refusedPolicy or Security status
X.7.2Mailing list expansion prohibitedPolicy or Security status
X.7.3Security conversion required but not possiblePolicy or Security status
X.7.4Security features not supportedPolicy or Security status
X.7.5Cryptographic failurePolicy or Security status
X.7.6Cryptographic algorithm not supportedPolicy or Security status
X.7.7Message integrity failurePolicy or Security status

Detaillierte SMTP 5.x.x Fehler Codes

Error/Status CodeDescription
5.0.0 Address does not existEmail id invalid or does not exists
5.1.0 Other address statusA problem occurred during the delivery of this message to this email address.
5.1.1 Bad destination mailbox addressSpecified from address or domain mailbox does not exists (anything after '@').
5.1.2 Bad destination system addressAddress does not exists or not able to accept mails
5.1.3 Bad destination mailbox address syntaxInvalid or corrupted character in email address
5.1.4 Destination mailbox address ambiguousCheck your spelling of email address and resend
5.1.5 Destination mailbox address invalidMail address may be invailid or may have spelling mistakes.
5.1.6 Mailbox has movedMailbox may be moved to new location
5.1.7 Bad sender’s mailbox address syntaxSender's address is invalid syntactically
5.1.8 Bad sender’s system addressSender's system in the address does not exist or is incapable of accepting.
5.2.0 Other or undefined mailbox statusThis error is usually return for which it has class (ie. 1xx,2xx,3xx,4xx,5xx).
5.2.1 Mailbox disabled, not accepting messagesSome changes need to made mandatory for resending mail
5.2.2 Mailbox fullTry increasing your emailbox space capacity
5.2.3 Message length exceeds administrative limit.The Size of your email has exceeded its limit try removing unwanted text.
5.2.4 Mailing list expansion problemmailbox saves your email address to whom you are sending or receiving emails, there is problem saving that email addresses.
5.3.0 Other or undefined mail system statusMail has been accepted normally
5.3.1 Mail system fullmail system at client's is not able accept emails
5.3.2 System not accepting network messagesyou need to whitelist the email address through your administrator it has been blocked.
5.3.3 System not capable of selected features
5.3.4 Message too big for systemMessage character limit has exceeded
5.4.0 Other or undefined network or routing statusMail accepted routing status is not available
5.4.1 No answer from hostConfiguration issue at recipient's server. you can send again once the issue is resolved at recipient's end
5.4.2 Bad connectionunable to connected or delay in connection
5.4.3 Routing server failureError is generated by the sender's server, you need to contact your ISP/ESP.
5.4.4 Unable to routeWhen emailid or hosts provided is invalid.
5.4.5 Network congestionMultiple connection on single channel.
5.4.6 Routing loop detectedSending message to same PMTA from you have sent.
5.4.7 Delivery time expiredMail is queued for 2-3 days after that it is removed by returning above messagae
5.5.0 Other or undefined protocol statusSomething went wrong with protocol while delivering mail which can be well expressed with other status code.
5.5.1 Invalid commandout of sequence or unsupported command used while sending mail
5.5.2 Syntax errorunable to interprete the command due wrong syntax or it is unrecognized.
5.5.3 Too many recipientsNumber of recipient is greater than the amount of recipient deliver by protocol
5.5.4 Invalid command argumentsthe arguments were out of range or represented unrecognized features
5.5.5 Wrong protocol versionprotocol version is mis-match which can't be solved at one go.
5.6.0 Other or undefined media errorIssue with content of the message which cannot be delivered.
5.6.1 Media not supportedMedia is not supported by protocol or the system who is going to formard the mail.
5.6.2 Conversion required and prohibitedMessage should be converted before it is send/delivery else it will be not delivered.
5.6.3 Conversion required but not supportedMessage must be converted in order to be forwared but partically it is not possible.
5.6.4 Conversion with loss performedThis is Warning to the sender that While conversion data may be lost.
5.6.5 Conversion failedMessage conversion was unsuccessful
5.7.0 Other or undefined security statusSomething went wrong while validating authentication which can be expressed with other status code.
5.7.1 Delivery not authorized, message refusedAuthentication was not successful due to which email was not sent.
5.7.2 Mailing list expansion prohibitedSending mail is not allowed to particular recipient.
5.7.3 Security conversion required but not possibleConversion was required to send mail securely which is not possible.
5.7.4 Security features not supportedAuthentication not supported at delivery end.
5.7.5 Cryptographic failureUnable to decrypt the message because the key was wrong or invalid.
5.7.6 Cryptographic algorithm not supportedUnable to decrypt the message because alogrithm was not supported.
5.7.7 Message integrity failureThe message is corrupted or altered