I am trying to put out a professional business letter and I'm having problems adding pictures to it. Advice?

I have tried using different servers and keep having problems. I just want to add a few pictures to my newsletters and email them to my coworkers. Is there any good programs I could use or could someone teach me how to do this with yahoo because that is my business email and I would like to use it.I am trying to put out a professional business letter and I'm having problems adding pictures to it. Advice?
Not quite clear on the question. First of all, what are you using to create the business letter? Second, where are you getting the images and what are the sizes? Is the problem that you are adding the pictures but the people you are sending the e-mail to are not seeing the images? Are you simply typing an e-mail and dumping images as attachments into the e-mail? If you can describe more specifically what you are actually doing, we can give you a better answer/