HEADER = '''FROM: TONY <lala@gmail.com>
TO: SOMEONE <bubu@gmail.com>
Subject: Test Message
Content-Type: text/html; charset=UTF-8

'''
IMAGE_TAG = '<img src="data:image/{};base64,{}"/>'

import sys
import base64


def main():
    eml_text = [HEADER]

    for i in range(1, len(sys.argv)):
        image = sys.argv[i]
        with open(image, 'rb') as i:
            encoded = base64.b64encode(i.read())

        extension = image.split('.')[-1]
        b64 = str(encoded)[2:-1]
        tag = IMAGE_TAG.format(extension, b64)

        eml_text.append(tag)

    with open('result.eml', 'w') as r:
        r.write(''.join(eml_text))


if __name__ == '__main__':
    main()