This gist downloads, converts, and tags the time in the images contained emails sent from my daughter's daycare. (Precious Status)

precious-status-emails.py

import imaplib
import re
import datetime
from os import system, environ


def process(client):
    rv, data = client.search(None, 'ALL')
    # print rv, data
    emails = data[0].split()
    # emails = ['209']
    for msgid in emails:
        rv, data = client.fetch(msgid, '(RFC822)')
        if data is not None:
            matches = re.findall(r'<img alt="Photo Update" border="0" src="(https://s3.amazonaws.com/[^"]*.png)\?([0-9]+)"', data[0][1], flags=re.M)
            for match in matches:
                print msgid, 'orig', match[0], datetime.datetime.fromtimestamp(float(match[1]))
                system("curl {uri} > '{date}'.png&&convert '{date}'.png '{date}'.jpg&&rm '{date}.png'&&exiftool -overwrite_original -DateTimeOriginal='{date}' -CreateDate='{date}' -ModifyDate='{date}' '{date}'.jpg".format(uri=match[0], date=datetime.datetime.fromtimestamp(float(match[1]))))


def main():
    client = imaplib.IMAP4_SSL(environ.get('PS_IMAP_SERVER', 'imap.gmail.com'))
    rv, data = client.login(environ.get('PS_IMAP_USER', 'matthias.granberry@gmail.com'), 
                            environ.get('PS_IMAP_PASSWORD'))
    # print rv, data
    rv, boxes = client.list()
    # print rv, boxes
    rv, box = client.select(environ.get('PS_IMAP_FOLDER'))
    # print rv, box
    process(client)


if __name__ == '__main__':
    main()

BTW it requires exiftool, ImageMagick, curl, and "less secure authentication" turned on if you are using gmail. There is no error-checking, so add some prints if you have a problem.