email modules and attachments that aren't there

[Russell Bungay]

Hello,

>>>     main_msg['Content-type'] = 'Multipart/mixed'
>> Would it be the 'Content-Type' header?  I've no expertise in this, but
>> doesn't 'multipart' mean 'has attachments'?
> Brilliant, thank you.  A swift test on the number of attachments and 
> changing the header suitably does the job.

That isn't quite all there is to it, the e-mail construction needs a 
slight change as well.  Roughly working code below.

Ta,

Russell

Code:

def sendEmail(msg_to, msg_from, msg_subject, message, attachments=[]):

     main_msg = email.Message.Message()
     main_msg['To'] = ', '.join(msg_to)
     main_msg['From'] = msg_from
     main_msg['Subject'] = msg_subject
     main_msg['Date'] = email.Utils.formatdate(localtime=1)
     main_msg['Message-ID'] = email.Utils.make_msgid()
     main_msg['Mime-version'] = '1.0'
     main_msg.preamble = 'Mime message\n'
     main_msg.epilogue = ''

     body_encoded = quopri.encodestring(message, 1)

     if len(attachments) <> 0:
         main_msg['Content-type'] = 'Multipart/mixed'
         body_msg = email.Message.Message()
         body_msg.add_header('Content-type', 'text/plain')
         body_msg.add_header('Content-transfer-encoding', 
'quoted-printable')
         body_msg.set_payload(body_encoded)
         main_msg.attach(body_msg)
         for attachment in attachments:
             content_type, ignored = mimetypes.guess_type(attachment)
             if content_type == None:
                 content_type = 'application/octet-stream'
             contents_encoded = cStringIO.StringIO()
             attach_file = open(attachment, 'rb')
             main_type = content_type[:content_type.find('/')]
             if main_type == 'text':
                 cte = 'quoted-printable'
                 quopri.encode(attach_file, contents_encoded, 1)
             else:
                 cte = 'base64'
                 base64.encode(attach_file, contents_encoded)
             attach_file.close()

         sub_msg = email.Message.Message()
         sub_msg.add_header('Content-type', content_type, name=attachment)
         sub_msg.add_header('Content-transfer-encoding', cte)
         sub_msg.set_payload(contents_encoded.getvalue())
         main_msg.attach(sub_msg)

     else:
         main_msg['Content-type'] = 'text/plain'
         main_msg['Content-transfer-encoding'] = 'quoted-printable'
         main_msg.set_payload(body_encoded)

     smtp = smtplib.SMTP('server')
     smtpfail = smtp.sendmail(msg_from, ', '.join(msg_to), 
main_msg.as_string())
     smtp.quit()