I am in the process of setting up mass email service.

My question is: what are the best practices to achieve maximum deliver-ability.

More precisely - what should I do/know to prevent spam filters from blocking the emails (the emails are not spam).

for example- how can I tell if my IP address is blacklisted somewhere and how can I prevent it from becoming blacklisted. Is amazon web services a suitable platform due to dynamic IP addresses, what are the restrictions on the from address, can it be different from the mail server domain.... you get it....