backupmail.py

import os, sys
from imapbackup3 import IMAPBackup
from datetime import datetime

with IMAPBackup(
    host = sys.argv[3] if (3 in sys.argv) else 'imap.forpsi.com',
    user = sys.argv[1],
    password = sys.argv[2],
    port = 993,
    usessl = True,
) as imb:
    now = datetime.now()
    folder = f'output/{sys.argv[1]} {now.strftime("%Y-%m-%d_%H-%M-%S")}'

    os.mkdir(folder)
    os.chdir(folder)

    imb.download_all_messages()