The only way to know if an email address exists for sure is to ask the mail server. We flag an email as risky if its mail-server was set to Catch-All but we managed to find at least one source that could validate it is existent.
The only way to know if an email address exists for sure is to ask the mail server. We flag an email as risky if its mail-server was set to Catch-All but we managed to find at least one source that could validate it is existent.