Reading your results: our status codes and what they mean

The ResultsStatus field on the validation report is the key field for understanding your verification results.

The possible values for this field and a description of those values are listed here below.

The descriptions include general recommendations for most customers. We strongly encourage each customer to consider their individual needs when evaluating non-definitive or risky results. Some customers will choose to reject all such results; others may choose to accept some or all of them, depending on their needs.

You can also download this information in either Excel or PDF by clicking on the links below.

 

   

 

Results Status Codes:

Success

Valid email. Verification was completed to mailbox level. No high-risk factors detected. Safe to send mail.

UnmatchedQuotedPair

Invalid email format, a quoted pair within a quoted word is not closed properly.

UnexpectedQuotedPairSequence

Invalid email format, an unexpected quoted pair sequence has been found within a quoted word.

InvalidWordBoundaryStart

Invalid email format, a new word boundary start has been detected at an invalid position.

InvalidCharacterInSequence

Invalid email format, an invalid character has been detected in the provided sequence.

UnbalancedCommentParenthesis

Invalid email format, the number of parenthesis used to open comments is not equal to the one used to close them.

DoubleDotSequence

Invalid email format, an invalid sequence of two adjacent dots has been found.

InvalidLocalPartLength

Invalid email format, the local part of the e-mail address has an invalid length.

InvalidFoldingWhiteSpaceSequence

Invalid email format, an invalid folding white space (FWS) sequence has been found.

IspSpecificSyntaxFailure

Invalid email format, the email syntax is invalid as per specific requirements for the internet service provider.

AtSignNotFound

Invalid email format, the at sign symbol (@), used to separate the local part from the domain part of the address, has not been found.

InvalidEmptyQuotedWord

Invalid email format, an invalid quoted word with no content has been found.

InvalidAddressLength

Invalid email format, the email address has an invalid total length.

DomainPartCompliancyFailure

Invalid email format, the domain part of the email address is not compliant with the IETF standards.

DnsQueryTimeout

Email failed to validate, a timeout has occurred while querying the DNS server(s) for records about the e-mail address domain. Retrying the validation may result in a definitive response.

DnsConnectionFailure

Email failed to validate, verification failed because of a socket connection error occurred while querying the DNS server. Retrying the validation may result in a definitive response.

DomainIsInexistent

Invalid email address, the domain of the e-mail address does not exist.

DomainIsMisconfigured

Invalid email address, the domain of the email address does not have any valid DNS records and couldn't accept messages from another host on the Internet.

DomainIsWellKnownDea

High risk email type, the email address is provided by a well-known disposable e-mail address provider (DEA). We strongly suggest removing DEAs from your lists.

SmtpConnectionTimeout

Invalid email address, a timeout has occurred while connecting to the mail exchanger which serves the e-mail address domain.

SmtpConnectionFailure

Invalid email address, a socket connection error occurred while connecting to the mail exchanger which serves the email address domain.

SmtpDialogueError

Invalid email address, an error occurred while communicating with the mail exchanger which serves the email address domain.

MailboxDoesNotExist

Invalid email address, the mailbox for the email address does not exist.

MailboxConnectionFailure

Failed to validate, a connection error occurred while validating the mailbox for the e-mail address. Retrying the validation may result in a definitive response.

LocalSenderAddressRejected

Failed to validate, the external mail exchanger rejected the local sender address. Retrying the validation may result in a definitive response.

LocalEndPointRejected

Failed to validate, the external mail exchanger rejected the local end point. Retrying the validation may result in a definitive response.

MailboxValidationTimeout

Failed to validate, a timeout occurred while verifying the existence of the mailbox. Retrying the validation may result in a definitive response.

MailboxTemporarilyUnavailable

Failed to validate, the requested mailbox is temporarily unavailable.  This does not indicate that the mailbox exists but is often a response returned by mail exchangers with greylisting enabled. For this reason, using a higher validation level may return a more accurate result.

ServerDoesNotSupportInternationalMailboxes

Invalid email address, the external mail exchanger does not support international mailbox names. To support this feature, mail exchangers must comply with RFC 5336 and support and announce both the 8BITMIME and the UTF8SMTP protocol extensions.

CatchAllValidationTimeout

Failed to validate, a timeout occured while verifying fake e-mail address rejection for the mail server. Retrying the validation may result in a definitive response.

ServerIsCatchAll

High-risk email type, the external mail exchanger accepts fake and non-existent e-mail addresses; therefore the provided e-mail address MAY not exist. The existence of the individual mailbox cannot be verified.

CatchAllConnectionFailure

Failed to validate, a connection error occurred while verifying the catch-all settings on the external mail server. Retrying the validation may result in a definitive response.

ProxyConnectionTimeout

Failed to validate, a timeout occurred while connecting to the configured proxy server. Retrying the validation may result in a definitive response.

HttpConnectionTimeout

Failed to validate, a timeout has occurred while connecting to the HTTP server (webmail) which serves the e-mail address domain. Retrying the validation may result in a definitive response.

HttpConnectionFailure

Failed to validate, a socket connection error occurred while connecting to the HTTP server (webmail) which serves the e-mail address domain. Retrying the validation may result in a definitive response.

UnhandledException

Failed to validate, one or more unhandled exceptions have been thrown during the verification process. Retrying the validation may result in a definitive response.



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