After sending mass mails to potential clients, i got many bounces and it affected my system score in the mailing rankings. and because of this my account got into optimized mode, after working with Reoon Email Verifier i only got legits mails and my openrate went skyrocket + I don't get bounces + get into optimized mode anymore. It's very easy to use i upload my batch of emails and i get a verified email batch back with sorted mails. It's so easy to use i have never had to contact support, i use this weekly before sending mass mails to potential clients!