Giving away the secrets of 99.3% email delivery
Getting whitelisted and managing your mail server isn't easy and usually costs a lot. I think it's only something that should be optimized when you are sending millions of emails pr. month (like they are).<p>For everybody else, you can save a lot of time and money by going for Amazon SES, Google App Engine, SendGrid or Postmark (etc.) A lot of these services also include analytics and monitoring and will be cheaper than rolling out your own customized solution (in terms of time and money).<p>Even for them they would only pay around $6000-$7000 pr. month by using Amazon SES.