Here's code that attaches the pdf file the two different ways. Both attachments are OK when I read the mail on OSX, but one is corrupt when read with Windows Mail on Vista. I wasn't sure what to do with the actual sending of the mail to the server. You'll have to change the code to use your account or something.

def emailReport(pdf):
    """Email the report as multi-part MIME"""

    from email.mime.multipart import MIMEMultipart  
    msg = MIMEMultipart()
    msg['Subject'] = 'Corrupt PDF'
    msg['From'] = 'Me <me@myProvider.net>'
    msg['To'] = 'You <you@yourProvider.com>'

    # Add the PDF the easy way that fails:
    from email.mime.application import MIMEApplication
    fp = open(pdf, 'rb')
    part = MIMEApplication(fp.read(),"pdf")
    fp.close()
    part.add_header('Content-Disposition', 'attachment',filename='This one fails.pdf')
    msg.attach(part)

    # Add the PDF the hard way using the legacy base64 encoder
    from email.mime.base import MIMEBase
    part = MIMEBase("application","pdf")
    part.add_header('Content-Transfer-Encoding', 'base64')
    part.add_header('Content-Disposition', 'attachment',filename='This one works.pdf')
    import base64
    fp = open(pdf, 'rb')
    part.set_payload(str(base64.encodebytes(fp.read()),'ascii'))
    fp.close()
    msg.attach(part)

    # Send the email
    from smtplib import SMTP
    server = SMTP('smtpauth.provider.net')
    server.login(user,password)
    server.sendmail(msg['From'], recipient, msg.as_string())
    server.quit()



emailReport('bugs.python.org_issue9298.pdf')