Hey there Niko! Findymail provides the best value for email finding and results in my experience. To check for catch-all emails, you want to use an email validator like Zerobounce or Neverbounce.
I mean the providers withing Clay , correct especially considering when using a waterfall.
Which ones are you putting first (usually i put the stricter ones first ), how many of them, which ones etc.
And also what debouncing tool you are using considering the catch all email verification as well
.png){kind=logo}
