Another option for image-conscious businesses is to go PDF, host the file on a website and then send out a short teaser email in ASCII format that points to the PDF file. There's all sorts of things you can do with that.

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Robert Warren
Copywriter, Editor, Business Communications Consultant

"Ten Copywriting Blunders That Are Poisoning Your Website"
FREE Report: http://www.rswarren.com/downloads.php