Create & Manage Email Campaign for a direct mail company

Looking for compnay to create and manage an email campaign for our company. We offer direct mail services and have collected over 500 email addresses in recent years - looking for a quality email campaign with valuable and relevant content fpr small business owners each time along with some content I will provide. Looking to have a link to download a report for $1 which also need to be created. Want complete statistics and reporting on open rate, links used and such. Also looking for any recomendations on the campaign for improvements as we go along. Only need the email sent 1 time per month to the 500+ email addresses that will be provided. Will pay on a monthly basis. Proivde links to similar past work done and what your price will be per month for this.