Email Address Verification Results

As a result of our Email Validation Process, we provide a result code for each email address.
Please see the table below for a detailed description of each result code.

Our Email Address Validation service is available as

If you have any questions, please send us an email to support@byteplant.com.

Email Address Verification Result Codes

ResultStatusRetryDescription
200OK - Valid Addressno The mail address is valid.
207OK - Catch-All Activeno The mail server for this domain accepts the address, but it also implements a catch-all policy. For this reason, it is not possible to determine if a mail account with this name actually exists, without sending a message and waiting for a reply.
215OK - Catch-All Test Delayedyes The mail server for this domain accepts the address, the Catch-All test returned a temporary error (API only).
ResultStatusRetryDescription
302Local Addressno The mail address lacks the domain qualifier. It may work locally within some organization, but otherwise it is unusable.
303IP Address Literalno The mail address is syntactically correct, but the domain part defines an IP address. This kind of address may work, but is usually only used by spammers, or for testing purposes.
305Disposable Addressno The mail address is provided by a disposable email address service. Disposable addresses only work for a limited amount of time, or for a limited amount of messages.
308Role Addressno The mail address is a role address and typically not associated with a particular person.
313Server Unavailableyes The mail server for this domain could not be contacted, or did not respond.
314Address Unavailableyes The mail server for this domain responded with an error condition for this address.
316Duplicate Addressno The address is a duplicate of an address that has already been processed (batch processing only).
317Server Rejectno The server refuses to answer to SMTP commands, probably because some very strict anti-spam measures are in effect.
ResultStatusRetryDescription
401Bad Addressno The mail address failed to pass basic syntax checks.
404Domain Not Fully Qualifiedno The mail address is syntactically correct, but the domain part of the mail address is not fully qualified, and the address is not usable.
406MX Lookup Errorno There is no valid DNS MX record associated with this domain, or one or more MX entries lack an A record. Messages to this domain cannot be delivered.
409No-Reply Addressno The mail address appears to be a no-reply address, and is not usable as a recipient of email messages.
410Address Rejectedno The mail server for the recipient domain does not accept messages to this address.
413Server Unavailableno The mail server for this domain could not be contacted, or did not accept mail over an extended period of time.
414Address Unavailableno The mail server for this domain responded with an error condition for this address over an extended period of time.
420Domain Name Misspelledno The domain name is probably misspelled.
ResultStatusRetryDescription
114Validation Delayedyes SMTP address validation is still in progress (API only).
118Rate Limit Exceededyes The API rate limit for your account has been exceeded (API only).
119API Key Invalid or Depletedno The API key is invalid, or the account balance is depleted (API only).
121Task Acceptedno The validation task was accepted.
ResultStatusRetryDescription
114Validation Delayedyes SMTP address validation is still in progress (API only).
118Rate Limit Exceededyes The API rate limit for your account has been exceeded (API only).
119API Key Invalid or Depletedno The API key is invalid, or the account balance is depleted (API only).
121Task Acceptedno The validation task was accepted.
200OK - Valid Addressno The mail address is valid.
207OK - Catch-All Activeno The mail server for this domain accepts the address, but it also implements a catch-all policy. For this reason, it is not possible to determine if a mail account with this name actually exists, without sending a message and waiting for a reply.
215OK - Catch-All Test Delayedyes The mail server for this domain accepts the address, the Catch-All test returned a temporary error (API only).
302Local Addressno The mail address lacks the domain qualifier. It may work locally within some organization, but otherwise it is unusable.
303IP Address Literalno The mail address is syntactically correct, but the domain part defines an IP address. This kind of address may work, but is usually only used by spammers, or for testing purposes.
305Disposable Addressno The mail address is provided by a disposable email address service. Disposable addresses only work for a limited amount of time, or for a limited amount of messages.
308Role Addressno The mail address is a role address and typically not associated with a particular person.
313Server Unavailableyes The mail server for this domain could not be contacted, or did not respond.
314Address Unavailableyes The mail server for this domain responded with an error condition for this address.
316Duplicate Addressno The address is a duplicate of an address that has already been processed (batch processing only).
317Server Rejectno The server refuses to answer to SMTP commands, probably because some very strict anti-spam measures are in effect.
401Bad Addressno The mail address failed to pass basic syntax checks.
404Domain Not Fully Qualifiedno The mail address is syntactically correct, but the domain part of the mail address is not fully qualified, and the address is not usable.
406MX Lookup Errorno There is no valid DNS MX record associated with this domain, or one or more MX entries lack an A record. Messages to this domain cannot be delivered.
409No-Reply Addressno The mail address appears to be a no-reply address, and is not usable as a recipient of email messages.
410Address Rejectedno The mail server for the recipient domain does not accept messages to this address.
413Server Unavailableno The mail server for this domain could not be contacted, or did not accept mail over an extended period of time.
414Address Unavailableno The mail server for this domain responded with an error condition for this address over an extended period of time.
420Domain Name Misspelledno The domain name is probably misspelled.