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Result Description


Deliverable 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.
Undeliverable An undeliverable result means the email address does not exist, or is syntactically incorrect (and thus does not exist).
Risky 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 AllDisposable, and Role addresses are classified as Risky.
Unknown 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.

Reason Description


Invalid Email Specified email is not a valid email address syntax.
Invalid Domain Domain name does not exist or is not configured to receive email.
Rejected Email Email address was rejected by the SMTP server, email address does not exist.
Accepted Email Email address was accepted by the SMTP server.
Low Quality Email address has quality issues that may make it a risky or low-value address.
Low Deliverability Email address appears to be deliverable, but deliverability cannot be guaranteed.
No Connection Could not connect to SMTP server.
Timeout SMTP session timed out or DNS query timed out.
Invalid SMTP SMTP server returned an unexpected/invalid response.
Unavailable SMTP SMTP server was unavailable to process our request.
Unexpected Error An unexpected error has occurred.

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