I run my own mail server on Azure for my domain. After deploying a new VM that will replace my existing server I stumbled upon the inability to run trivial email diagnostic tests like port25's DKIM tester. I found this Microsoft article showing that MS decided to shut down the ability for new deployments to run port 25 and that a support request should be made to unlock port 25 outbound.
The article says that the support request must be for a technical issue, however my subscription does not allow technical support requests unless I buy a paid MSDN subscription.
I run my own domain on a very low budget and mostly for fun than for profit, but I am trying to reduce the number of servers after shutting down my ecommerce hosting business. So I wouldn't like to pay for a subscription that is worth more than the two servers I currently run.
How can I request port 25 unlock and go through Microsoft's screening without the ability to issue technical requests?