Create README.md

README.md

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+# ProtonID
+I recently had a need to identify a large number of emails/domains to see if they had protonmail accounts. I checked this by seeing if they had proton's MX re
+cords set up.
+![image](https://user-images.githubusercontent.com/19278569/210284808-a5d629c4-105c-4070-a01e-a0fd051dcb5b.png)
+
+![image](https://user-images.githubusercontent.com/19278569/210284867-2179f8cf-fa73-4561-95ce-98d02a900762.png)
+
+
+
+![image](https://user-images.githubusercontent.com/19278569/210284845-c0c9dbe9-d43d-45e9-ac0c-c57ce9372280.png)
+
+# Usage
+```bash
+python3 protonID.py -e me@grahamhelton.com
+python3 protonID.py -l list.txt
+python3 protonID.py -l /path/to/list.txt
+
+# Return just emails with some commandline kung-fu
+./protonID.py -l emails.txt | grep "has proton mail MX records" | awk {'print $3'} | sort | uniq
+```