We are a small organization with DSL for our internet service provider. We currently have our website and email hosted by Media Temple. We have 2 mailing list that go out once a month. One mailing list has 800 recipients with a 1.8MB attachment. We use Media Temple's(smtp.mywebsite.com) server for the outgoing email. We can no longer send all the messages becasue of the email rate limit imposed by Media Temple.
What kind of service change, software, or provider is available to eliminate the smtp email restriction?