Outlook & Office 365 Email Settings

In late 2023, Microsoft Outlook's spam prevention settings got a major overhaul and became exponentially more aggressive than they had previously been. This has resulted in many of our customers not being able to receive emails from ring-u, including voicemail transcripts, billing notices, and other account information notices.
While Outlook's spam prevention cannot be disabled, it can be configured to be less hostile.
Please follow the instructions included here to allow @ring-u.com and any other frequent senders to pass through the spam filter. It may be necessary to monitor the spam folder for a few months to make sure you have configured things correctly.
Here is a simplified third party write up of how to deal with this problem. We are not affiliated with the author, but it was passed by a long time customer who said it was helpful to him.