Python script to check valid email addresses

We were having discussion about checking a list of email addresses for validity.
one of member had posted a bash script for Linux to verify the email addresses before sending the emails.

I thought to write a python script for the same in windows. Well this script can be easily ported to linux with just one or two lines changed. But I was too tired after all day office work to write check for OS and write windows as well as linux code. Currently it is only for gmail domain. But can be easily ported to every domain. Just need to extract domain from email id and check its MX by the existing code. (I told you already I am tired to write more code)
If some people found this useful and need sophisticated version then I would release a next version of program.

This python code take one argument which is list of emails one per line in text format.

You can download python file HERE