Dear (recipient's name),
I am a trained writer and studied the English language in college. I love words and I love creating articles and newsletters. I noticed the company doesn't distribute a monthly newsletter and I think we need one. With a company as large as ours, I think regular communications will help keep everyone on the same page. Because of my training, I am volunteering to write the newsletter. We can distribute it via e-mail so it won't cost the company any additional money.
With your permission, I will proceed to develop a monthly e-mail newsletter.
Sincerely,
(your name)