This article describes core features of email validation functionality and how it works step by step:
Getting rid of the duplicated emails and present only unique addresses
Fully checking of the verify list from addresses with syntax errors
Marks all the emails containing inactive or invalid domains
Validates MX records on existence for every mail address
Checks SMTP: connection to SMTP servers and simulate sending of an email message
Flags emails outputting different mailbox errors including messages like "Mailbox full."
Identifies and marks all the emails which domain accepts any email on their domain
(aka Risky email)
The validation works at the time you launch and gives the ability to run work processes fast and effortlessly.