|A deliverable result means the recipient’s mail server stated the recipient exists. SmartSoft has also performed additional analysis and determined this address is safe to send to within our 95% Deliverability Guarantee.
|An undeliverable result means the email address does not exist, or is syntactically incorrect (and thus does not exist).
|A risky result means that the address has quality issues that may result in a bounce or low engagement. Therefore, use caution when sending to risky addresses. Accept All, Disposable, and Role addresses are classified as Risky.
|SmartSoft will return an unknown result when it was unable to get a response from the recipient’s mail server. This often happens if the destination mail
server is too slow or temporarily unavailable. In some cases, retrying your request after about 5 minutes will return a valid or invalid response. Unknown addresses don’t count against your verification balance.
|Specified email is not a valid email address syntax.
|Domain name does not exist or is not configured to receive email.
|Email address was rejected by the SMTP server, email address does not exist.
|Email address was accepted by the SMTP server.
|Email address has quality issues that may make it a risky or low-value address.
|Email address appears to be deliverable, but deliverability cannot be guaranteed.
|Could not connect to SMTP server.
|SMTP session timed out or DNS query timed out.
|SMTP server returned an unexpected/invalid response.
|SMTP server was unavailable to process our request.
|An unexpected error has occurred.