Ok, started an Exchange 2013 on fresh Server 2012 VM. Finished and opened ports 25 and 443. Setup A record of mail.company2.com to point to public IP of Exchange server and then pointed CNAME records owa and autodiscover to the A record. Set MX record to mail.company2.com. The original domain in AD is company1.com while the accepted domain I setup is company2.com which assigns to a specified OU in AD under email address policies. I have not purchased an SSL just yet because the company2.com is just a test domain I setup before we do a huge changeover from GoDaddy to our own Exchange server.
I am able to open OWA and get logged into my mailbox, but cannot send/receive anything locally or remotely. Same from phone and Outlook. I go to mxtoolbox.com and get the following:
Connecting to X.X.X.X
SendSMTPCommand: You hung up on us after we connected. Please whitelist us. (connection lost)
Anything I should be looking at internally? I have not made any DNS changes on the Exchange or AD server internally. Should I have more ports opened in my firewall?
Update : Just tested the Calendar entries from an offsite computer and it shows up on my phone. So there is communication to the database, just can't figure out this send/receive issue.