What does it do?
When your user types in ‘email@example.com’, Mailcheck will suggest ‘firstname.lastname@example.org’.
Mailcheck will offer up suggestions for second and top level domains too. For example when a user types in ‘email@example.com’ then ‘hotmail.com’ will be suggested. Similarly if only the second level domain is miss-spelled then it will be corrected independently of the top level domain allowing for fine resolution tweaking if desired."