You need python 2.7 to use this script!
Put the emails you want to check (just yahoo emails) into the check.txt file as so

Code:
e@yahoo.com
e2@yahoo.com
etc@yahoo.com
Open CMD / Terminal -> Browse to folder -> type in either run.py or python run.py -> ???? -> PROFIT!!!

All available emails will be saved in available.txt and will printed into the terminal / console.

Download: Here
Virus Scan: Who needs a virus scan? It's a python script.