Reply allows you to check your prospects' email addresses if they are valid or not. After you have validated your prospects, you can create a smart filter to sort out all Invalid or Risky prospects and move them to a separate list or delete them. To do this:
Open the People page of your Reply account.
Click ADD FILTER.
In the Filter name field, enter the name for your filter (optional).
In the Property field, select Email Validation status.
Select the Is Invalid condition.
Click Save to save the filter and see filtered results.