First post on this forum and first-time cloud server manager. Not an IT professional by trade, so please take that into consideration while reading.
I was trying to setup a mailing server for my company on my UCS server with OpenXchange. I got the Open-Xchange part working for the cloud stuff, storage and collaborative documents all work fine, and I can also send emails from the server to an external address without issue and with the correct domain extension. So all of that works just fine.
The problem is when I go to send mail from an external address to the server, the mail never arrives. I have tried to look into putting an MX record in with my domain provider (GoDaddy) but after several combinations of that, along with A records, I still am not able to get the mail to send across. I am not sure where to go from here, I have exhausted all of what I can think of on google to search for an answer to this.
Any help would be greatly appreciated. Thank you so much in advance!