How to get line breaks in e-mail sent using Python's smtplib?

Question

I have written a script that writes a message to a text file and also sends it as an email. Everything goes well, except the email finally appears to be all in one line.

Answer 1

Setting the content-type header to Content-Type: text/plain (with \r\n at the end) allowed me to send multi-line plain-text emails.