Why most, but not all email makes it to the server?
I've been racking my brain on why most locations are able to send email to us, however other locations (other schools for example) get mail bounced back. The locations that can make it always make it and the ones that don't never do.
my exchange server 2010 ip is 184.108.40.206. My domain is parkcountyre2.org. My exchange domain is mail.parkcountyre2.org. I pass the http://www.mxtoolbox.com/ mx record checks and the inbound email flow checks from www.testexchangeconnectivity.com . I also pass the Best Practice Analyzer on everything I've tested.
I hired a Exchange tech to remote in and confirm that everything is setup correctly.
Any suggestions would be greatly appreciated.