python3 update_mailbox.py -h       
usage: update_mailbox.py [-h] [-k KEY] [-s SRC] [-d DEST]

Utility to bulk update aliases from one mailbox to another

options:
  -h, --help            show this help message and exit
  -k KEY, --key KEY     SimpleLogin api key
  -s SRC, --src SRC     the mailbox email address to change from
  -d DEST, --dest DEST  the mailbox email address to change to