Bulk Email Verifiying / Email List Clean For Free

Hi everyone!

I was looking for a free method that can be verifying email lists like 10k or more.

I tried to search but I see that you can try 20 or 100 to verify it but nothing more.

does anyone know a cracked program or a website that offers bulk email verifying? so that when I send an email it does not BOUNCES

thank you in advance