This python Script help us to extract all email's adresse contained in a text file to a best useful Email's list
Open a terminal
chmod +x Extract_Email.py
To print a vertical List_Emails:
./Extract_Email.py -i Your_inputEmails.txt -o Your_outputEmails.txt
To print a List_Emails Separated by comma:
./Extract_Email.py -i Your_inputEmails.txt -o Your_outputEmails.txt -f ,