Email Verification Codes

Valid codes

CODE NUMBER
STATUS
CODE DESCRIPTION
200 OK - Valid Address The mail address is valid.
207 OK - Catch-All Active 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.
215 OK - Catch-All Test Delayed The mail server for this domain accepts the address, the Catch-All test returned a temporary error (API only).

Invalid codes

CODE NUMBER
STATUS
CODE DESCRIPTION
401 Bad Address The mail address failed to pass basic syntax checks.
404 Domain Not Fully Qualified The mail address is syntactically correct, but the domain part of the mail address is not fully qualified, and the address is not usable.
406 MX Lookup Error 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.
409 No-Reply Address The mail address appears to be a no-reply address, and is not usable as a recipient of email messages.
410 Address Rejected The mail server for the recipient domain does not accept messages to this address.
413 Server Unavailable The mail server for this domain could not be contacted, or did not accept mail over an extended period of time.
414 Address Unavailable The mail server for this domain responded with an error condition for this address over an extended period of time.
420 Domain Name Misspelled The domain name is probably misspelled.

 

Suspect codes

CODE NUMBER
STATUS
CODE DESCRIPTION
302 Local Address The mail address lacks the domain qualifier. It may work locally within some organization, but otherwise it is unusable.
303 IP Address Literal 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.
305 Disposable Address 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.
308 Postmaster Address The postmaster address can only be used to contact the administrator of a mail server.
313 Server Unavailable The mail server for this domain could not be contacted, or did not respond.
314 Address Unavailable The mail server for this domain responded with an error condition for this address.
316 Duplicate Address The address is a duplicate of an address that has already been processed (batch processing only).
317 Server Reject The server refuses to answer to SMTP commands, probably because some very strict anti-spam measures are in effect.

 

Indeterminate codes

CODE NUMBER
STATUS
CODE DESCRIPTION
114 Validation Delayed SMTP address validation is still in progress (API only).
118 Rate Limit Exceeded The API rate limit for your account has been exceeded (API only).
119 API Key Invalid or Depleted The API key is invalid, or the account balance is depleted (API only).
121 Task Accepted The validation task was accepted.