IncrediMail has been around for many year. I know a lot of people who use it and they all love it. My mother, who was new to the Internet just a few years ago, uses it and loves to send me colorful, animated emails.
I used to use it but stopped when I decided to start using online email instead. Why did I move to online email? Well because I use my email mostly for work, and I get a lot of emails, I didn't want to use up my computers space for storing emails. Graphics really aren't that important in emails I sent to the people I work for.
My mom on the other hand has been using it for a few years and many of my online friends use it too. Overall they don't have anymore problems with the program then people who use other email programs. I call this a "plus".
Anyway, Incredimail lets you add graphics, sound, photos and other things to your emails with a click of the mouse. It's very simple to use.