How to not get flagged by oligopoly of email providers?
 

I have a non-profit that wants to send emails. How do you submit request to big email providers that they do not block your domain? I want to set up a small server because its astronomically cheaper than AWS SES (which is the cheapest option).

Thanks guys

Such requests will be ignored.
Have you considered using a reputable provider of mailing list distribution? For example mailchimp.com or many alternatives.

If you are sending out thousands of emails you should just subscribe to Mailchimp or Constant Contact and deal with the pricing. I used to work for another company that specialized in emails for nonprofit associations and we had fulltime people that worked on maintaining our ability to send and be received. All it takes to get blocked is for a few people receiving your email to report you as spam, plus there are many other problems. Google is tightening up their enforcement of standards for mass emails, and will start rejecting lots of emails in April:
https://www.forbes.com/sites/daveywi...h=199910ce32fa

Whether you want to and/or can DIY, or you have the financial ability to pay another for the service, here's a suggestion. I've used this project before, and will again if I ever have the need to. dada mail at DuckDuckGo

- Bruce