Most important security measure : Enable 2FA on all your accounts.

Politics. Current technologies allow implementation of direct democracy. people can cast their votes on every matter to their representatives. It can simply start with a voting app for smaller institutions and eventually transform the congress as we know it.

1. Creating a good IP reputation takes time, get a static IP from your ISP and gradually increase number of sent out emails.

2. Having multiple IP addresses and throttling helps if you send bulk emails.

3. Check email headers of spammed emails, they usually contain valuable info about the reason of being detected (SPF/DKIM ,...)

4. Check the contents of your emails and find out spam score of the content.

5. You can look into commercial solutions like: www.own-mailbox.com

6. Hillary, if it's you, don't do it again!

now I'm happy that we used SMTP plus tags in mail headers and not their API. at least we can hot swap their service. any recommendations on transnational email provider without initial sender domain verification?

They had a pretty relaxed strategy on sender domain verification. which was great for white-labeling transnational email on multiple domains.

Goodbye Mandrill.