Email Format - Returns 'Valid' for proper email syntax, otherwise returns 'Invalid'.
SMTP Test - Contacts the email address via the Simple Mail Tansfer Protocol (SMTP) to determine whether the email address provided actually exists. Returns 'Passed' if the email address exists, otherwise returns 'Failed'
Quality Score - Returns a value from 0 (Bad) to 1 (Good) (Quality Score is only an indicator and should not be the only factor when determining whether or not to send to an email address.)
For transactional email:
For marketing email:
Did You Mean - Returns an alternative email suggestion if a potential misspelling is detected in the domain part of the email address