Need Introduction Letter

I am putting together an introduction letter to tenants that I let office space to, can you please give me some guidance:)

How to write a letter introducing oneself for the first time for a business proposal?

Hi guys, Im a student researching on how to make an effective company introduction letter. Can you please give me some sample. It's about an established telecommunication company. Thank you so much! -mia-

I would like to know how to write a letter of introduction for my new business.

I want to write a letter of introduction for my new catering business. I have keyed in on certain businesses that often have catered events, and I want to introduce my business to them for their future events. Can you show me how to write this letter?