Outlook and Hotmail blocking emails

Dear Sam WJI  Thank you for using Microsoft products and posting in the community.Based on your description, I know you can't forward emails to your mailbox normally*We only ever send individual emails, never any spam. Some have attachments like PDFs of food menus but that's it.*What are the domain names of these people? Is it similar to @ Microsoft's corporate domain? Also, what is your current email address? Have you purchased an M365 subscription?I think sending PDFs with food regularly is very easy for servers to recognize as spam. You can restore it through the link below.New support requestYou can also contact Microsoft's online support, who like me are real people and not robots.Microsoft doesn't have phone customer service for account issues, only online chat customer service.If you'd like to talk to them, follow the steps below to get in touch with their online Outlook.com team:1. Contact - Microsoft Support2. In the "We will work for you at any time" box below, enter MSA, click "Get Instructions", and then click "Contact Customer Service" below.3. In this section, you need to register a personal Microsoft accountNote: You can only use a personal MSA to sign up, and the company account can't display the correct content. If the account can't be connected, you can use a different account or create a new account to run it;4. Select "M365 & Office" under Products & Services, select "Outlook" as the category, and click to confirm5. You can select "Chat with support specialists in the web browser" to access the chat window.Thank you for your understanding and cooperation.Best regardsKokutou-MSFT |Microsoft Community Technical Support Specialist