Email verifier & validator Vs bounces & spamtrap

How can I use email verifier and validator to confirm that emails are actually exists and are accepting incoming mails to reduce the bounce-count for getting high reputation as well as how can monitor and stop spam-traps to avoid IP blacklisted?
I am asking this because I have both types of email-lists like actual subscribed and third-party email-lists.
To use actual emails from third-party email bunch and avoid/remove fake emails from the list.
Hope someone can help regarding this and I appreciate for the help.