Email verifier & validator Vs bounces & spamtrap

Hello,
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.

Regards,

Hello,
As per my view, not all of email marketers have only subscribed list of email but they have also lists of buy/marketed from some one others.
I just make this thread active to know about any features included in phpList to process this.

Regards,