I need to clear fake emails from a pile of ~20.000 emails. Sending verification email is not an option on this case since users already signed up.(and most probably don't even remember their password anyway)
I have tried smtp verification but connection attempts to most popular esp's always return connection failed or timeout reached over the port "25" & "587" (i assume they block smtp requests on purpose)
I don't want to use a paid web service since 20k email verifications cost about 150$ (which i can not afford in my current situation)
How can i achieve email verification under these circumstances (TIA)
