The API can return the following results which determine deliverability. Both GOOD and RISKY verdicts are safe to send emails to.
|GOOD||The email address passes our tests and can be safely emailed|
|INVALID||The email address' format is incorrect or the remote mail server does not exist|
|UNKNOWN||Could not run all validations in time. You may want to try validating using webhooks.|
|REJECTED||The remote mail server rejected accepting emails for this email address|
|RISKY||The email server employs an anti-spam technique which doesn't allow us to detect deliverability. Emails can still be delivered but there is no guarantee it'll be delivered to the addressed inbox.|