Here's what one of my contacts just said about Constant Contact's Plain-Text email:
"The minute I opened the year-end message, I saw that yet another of
the 501C# orgs that I support is being disserved by Constant Contact.
"Their disdain for your email results in me getting the message reproduced below. For security reasons I use a text-only mail reader. Constant Contact sends multipart-alternative messages supposedly to provide plain-text mail in addition to pretty HTML. But the way they extract plain text would draw a low grade in a freshman computer-programming course: simply run together all the text parts of the HTML. Any beginning programmer could do a better job with a few hours work. Their dereliction reflects badly on their customers."