Some mail servers will block the requests, if too many are sent too fast. You can use the variables to add delays:
-`WAIT_EVERY` the amount of mails sent at once
-`DELAY_SEC` the amount of seconds to wait between sending the next batch
### Other options
-`LOGLEVEL` the logging level, set to `'DEBUG'` for most output
-`DRY_RUN` if set to `True`, the mails wont get sent, but the output is generated as if they would be sent. Good for testing and best to use with `LOGLEVEL = 'DEBUG'`