https://www.youtube.com/watch?v=mmnnV-hARj4
https://www.youtube.com/watch?v=P5NeyiRPYiY
https://www.youtube.com/watch?v=6SfXXtb-nHM
https://www.youtube.com/watch?v=5q44aoZQQIg
### Postfix mail configuration examination
Looking for a postfix email expert. Examine my configuration and recommend changes to make our mail more deliverable. Gmail is blocking our messages. See attached image of error message from postmaster.google.com.