mail list cleaning

hello people
i need your suggestions or help please. i previously used a script that consists of using office smtps to clean email lists. the concept is to ping emails and clean the list based on the feedback. but lately this concept no longer cleans lists. the results are highly inaccurate
can you suggest an alternative ?
thank you

Same Here, I Have The Exact Problem, Did You Find Any Solutions Brother? Let Me Know Please.
Thanks In Advance.