Automated Email Validation System

I have a list of email addresses of my customers whom previously I sold an antivirus subscription from a specific software brand. I want to know which of these customers still have active accounts with that brand.

The brand has a support chat page where you enter an email address. The system immediately tells you if that email is associated with an account:

If YES → it proceeds to the next page

If NO → it shows an error message saying "email not associated"

I need an system which automates this process and updates my data. Can you do this? If yes I will provide you more details.

What I Need:
It will go like this. (can be few more adjustments or addition, I will provide you the software chat support page and few email addresses with account active and without account, you can check yourself)

Read emails from a CSV file (Column A)

Open a private/incognito browser

Go to the software support chat page

Enter each email and detect the result

Write "YES" or "NO" in Column B

After 2 or 3 consecutive "NO" results it tells to go ahead as a guest → so close and reopen a fresh private/incognito browser

proxy/IP rotation to avoid being detected and blocked.

Process in batches (configurable, like 150 emails)

Random delays: 1-15 seconds between emails, 30-90 minutes between batches

Save progress so I can stop and resume anytime

Can be easily played on multiple machines which run on Windows (including Windows Server)