List GMail big size messages

from imapclient import IMAPClient

HOST = 'imap.gmail.com'
USERNAME = '***yourGMAILusername***'
PASSWORD = '***yourGMAILpassword***'
ssl = True

FOLDER = 'INBOX'
### The default is to scan your Inbox. Uncomment the line below if you want
### to scan all of your mail. It could take >5min to scan all of your email.
# FOLDER = '[Gmail]/All Mail'

SIZETHRESHOLD = 10000000
### Scan for files larger than the number above (in bytes; 10Mb is reasonable to start with)



server = IMAPClient(HOST, use_uid=True, ssl=ssl)
server.login(USERNAME, PASSWORD)


select_info = server.select_folder(FOLDER)
print '%d messages in %s' % (select_info['EXISTS'], FOLDER)


print
print "Messages:"

criteria='LARGER %d' %SIZETHRESHOLD
messages = server.search([criteria])

response = server.fetch(messages, ['RFC822.SIZE', 'ENVELOPE'])
for msgid, data in response.iteritems():
    if data['RFC822.SIZE'] > SIZETHRESHOLD :

        envelope = list(data['ENVELOPE'])
        sender = list(envelope[2][0])

        print '   ID %d: ' % msgid
        print '     From: %s <%s@%s>' % (sender[0], sender[2], sender[3])
        print '     Subject: %s ' % envelope[1]
        print '     Size: %i' % data['RFC822.SIZE']