Hi there,

I want to send an email with an attachment using the following code (running under Python 3.1, greatly simplified to show example)

   from email.mime.multipart import MIMEMultipart
   from email.mime.text import MIMEText

   msg = MIMEMultipart()
   msg['From'] = from_addr
   msg['To'] = to_addr
   msg['Subject'] = subject
   msg.attach(MIMEText(body))

   fp = open(att_file)
   att_msg = MIMEText(fp.read())
attachment = att_msg.add_header('Content-Disposition', 'attachment', filename=att_file)
   msg.attach(attachment)

   # set string to be sent as 3rd parameter to smptlib.SMTP.sendmail()
   send_string = msg.as_string()


The attachment object msg1 returns 'email.mime.text.MIMEText' object at <address>', but when the att_msg.add_header(...) line runs the result is None, hence the program falls-over in msg.as_string() because no part of the attachment can have a None value. (Traceback shows "'NoneType' object has no attribute 'get_content_maintype'" in line 118 of _dispatch in generator.py, many levels down from msg.as_string())

Has anyone any idea what the cause of the problem might be? Any help would be appreciated.

Alan Harris-Reid
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