Good Day, We recently migrated our RT server (CentOS7) running Postfix to Azure from the data center environment where it was before. Incoming mail is working fine and tickets are being opened. Outgoing mail is working to external (non Office 365 domains) like gmail and yahoo. We have added the new public IP of the RT server as an allowed connector in Office 365.
We did not set up this server originally, but wondering if there is something in the server (firewall rule) that would affect its ability to send mail out now that it has both a new private and public facing IP?
Or if Azure is blocking it from sending to Office 365. We do have a windows smtp server that is sending from azure to office 365 just fine.