Send mail via mail client using Python script

[radc]

Hello Python community :)
This is my first post so don`t judge strictly.

I need the user's client to start, so that the user may edit the message and decide himself whether he clicks on the Send button to really send it.

I have searched on google and most code are for Windows OS only. Can`t find anything for Mac OS. I personaly using Win but doing my project for Mac OS.

[TrustyTony]

Making one simple text window to edit the email and one send button should not be so difficult. Then you can use the email module(http://docs.python.org/library/email-examples.html).

[radc]

Ok, I though about this. I am using Tkinter and I know how to create a window with some widgets including Send button. But, I have quiestion then. My programme should send an attached file. So then user clicks on a name of object, programme should identify selcted name, find it in the directory and attach it to the mail window.
visually it is supposed to be like this: user clicks on name from list of names, presses the button 'Send mail', appears a mail window with already attached file so the user can see it. After editing some message, user presses button 'Send' and it is done.
So how to implement this?

[radc]

When I send my email, I receive an empty message with no picture. Any ideas?
Here is the code:

import smtplib
import base64

filename = "D:\\test.png"
receiver = "[e-mail]"
body = ""
subject = ""

def sendTO(filename,receiver,body,subject):
    fo = open(filename, "rb")
    filecontent = fo.read()
    encodedcontent = base64.b64encode(filecontent)

    sender = '[e-mail]'

    marker = "AUNIQUEMARKER"
    # Define the main headers.
    part1 = """From: From Person <[e-mail]>
    To: To Person <%s>
    Subject: %s
    MIME-Version: 1.0
    Content-Type: multipart/mixed; boundary=%s
    --%s
    """ % (receiver,subject,marker, marker)

    part2 = """Content-Type: text/plain
    Content-Transfer-Encoding:8bit
    
    %s
    --%s
    """ % (body,marker)

    # Define the attachment section
    part3 = """Content-Type: multipart/mixed; name=\"%s\"
    Content-Transfer-Encoding:base64
    Content-Disposition: attachment; filename=%s
    
    %s
    --%s--
    """ %(filename, filename, encodedcontent, marker)
    message = part1 + part2 + part3

    username = "my username"
    password = "my pass"

    server = smtplib.SMTP('smtp.gmail.com:587')
    server.ehlo()
    server.starttls()
    server.ehlo()
    server.login(username,password)
    server.sendmail(sender, receiver, message)
    server.quit()
    print "Successfully sent email"