Better idea would be a PDF version of the email if you don't want to use one of the commercial services (mailchimp).
Personally, I use a program to create HTML emails ... High Impact Email by Templatezone (click here)
Works well for me, your mileage may vary.
I got mine (v5) free from Serif with another purchase ... a "thank you" so to speak. You can design a webpage within the program and email it to as many recipients as you have addresses from.
Don't send me any though, I don't have time to read them.
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