import imaplib
import time

# Put your credentials here...
hostname = 'imap.example.com'
username = 'j.doe'
password = 'password'

imaplib.Debug = 3

connection = imaplib.IMAP4_SSL(hostname)
connection.login(username, password)
connection.select('Inbox')
time.sleep(30)

# With another IMAP client open, say, Thunderbird.
# Send a few emails to the account.
# (Might require a longer delay if emailing across domains)
# This will provide noop() with some untagged responses.

connection.noop()  # Crashes here.

# If the code gets here then noop() has not found any untagged responses.

connection.close()
connection.logout()