How to remove the unverified sender message?

This is happening on an alias we have set up on a shared mailbox. We have a website where we have users fill out a form and that form is emailed to the shared inbox using an alias so we can sort those emails and apply rules. None of that is working because the email is marked as "unverified" and put into the junk box. Can't list it as a safe sender because Outlook won't let you add your alias to the list. Even when you click the safe sender dialog, Outlook does not whitelist it and it still goes to junk. Rules do not work either. I don't need a separate mailbox to manage just for collecting some forms. I understand in this day and age, you need strong security, but users should be allowed to override a setting and accept the risk if they choose to do so.

I couldn't agree with you more. I have stuff blocked and now it is coming in to my mailbox. Yet another STUPID decision made by the people at Microsoft because these companies paid them off !!!! You cannot at it to a rule to send it to trash. I wonder why ? How much did you guys make at Microsoft for doing this to the public ????? It's ridiculous. Everyone needs to get off of Microsoft products.

Now it seems that email spambots are taking advantage of this to send countless emails to my Outlook inbox. This is a mess, and you must consider removing this "feature".

The response we received from support and PG, after much pushing was to :

disable Email and collaboration> Policies & rules> Threat policies> Anti-phishing> (On your policy disable)> Unauthenticated senders symbol (?) for spoof.

We have not verified or tested this as yet.

We turned this off about a month ago, and the issue appears to have stopped for now. Can't confirm if it was this change or if Microsoft changed something on their end.