To run the app:
- open a terminal or command prompt
- navigate to the directory containing smtpauthbatch.py
- (in windows) type "set FLASK_APP=smtpauthbatch.py"
- (under linux) type "export FLASH_APP=smtpauthbatch.py"
- type "python -m flash run"
- navigate to 127.0.0.1:5000 in your browser