A serverless email server on AWS using S3 and SES
Reading it I get that AWS now by default restricts email by  - 200 mails per day max. 1 per second.  
  - Can only send mail to verified addresses. Not sure how they verify though.  
  - Can only send mail from the domain you own and verified.

All these are good steps. Guess that will gradually take AWS IPs out of all those mail blacklists.And while we are on the topic, I find IP based mail blacklist services such as BRBL obsolete and possibly harmful. Now that we have domain verification services like DKIM SPF etc. Blacklist the domain. Not ip addresses as most institutions don't own their IPs like in the past. Most of all are hosted, and that IP might get assigned to someone else a few days later.