Moving out of Google Suite (Workplace). Part 5: Secondary DNS and blacklists.

Having secondary / backup DNS is recommended.

I ended up using Backup DNS on Free DNS by Joshua Anderson.

It is stable, easy to setup and free.

For blacklists and overall health checks I use:

• Google Postmaster Tools (v2 version)
• MXToolbox black lists check
• DNS checker's IP Blacklist & Email Blacklist Check