long lines in HTML attachments

[Iddo]

Hi,

I am trying to use smtplib and mimecntl to email an attached html
document. The trouble is that the html document contains some very
long physical lines (500 chars). It is important that those lines be
preserved as such, since I use <pre> formatting in the htdoc. Some
mail clients (e.g. Pine 4.40) truncate or insert a linefeed in those
lines, creating a mess. Any way of attaching my long-lined files and
getting them through intact? Following is a code snippet of what I do.
Any help would be appreciated.

Thanks,

Iddo
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def email_with_attachments(to_addr, subject, msg_string, attachment):
    f = mimecntl.MIME_document("",type='text/plain')
    f.write(msg_string)
    # Create the message + attachment
    attach = mimecntl.MIME_recoder()
    att_file = open(attachment[1],"r")
    att_stream = att_file.read()
    attach.write(att_stream)
    attach['content-type']=mimecntl.MIMEField('content-type',attachment[0],
                                                   
name=attachment[1])
    attach['content-length']=mimecntl.MIMEField(
                                   'content-length',
                                   len(att_stream))
    attach['content-disposition']=mimecntl.MIMEField(
                                   'content-disposition',
                                   'attachment', 
                                    filename=attachment[1])
    msg = mimecntl.MIME_document((f,attach), 
                                  From='myself at myserver.org',
                                  To=to_addr,Subject=subject)
    # send msg using smtp
    smtp = smtplib.SMTP('localhost')
    smtp.sendmail('myself at myserver.org',to_addr,msg.dump())
    smtp.quit()
if __name__ == '__main__':
    attach_info = ('text/html','/my/html_file.html')
    email_with_attachments('you at youraddress','hi there',attach_info)