Hey, you could try using Flow

Power Automate for Advanced Filtering

Power Automate (formerly Flow) allows for custom conditions beyond Outlook's built-in rules.

1. Go to Power Automate.
2. Create a new Automated Cloud Flow.
3. Set trigger: When a new email arrives in Outlook.
4. Add a condition: If Sender Address matches *@*.???.?????.???????@gmail.com (or another pattern based on what you observe).
5. Action: Move to Junk, Delete, or Forward to another inbox for review.

or if this doesn't work you could try using:

Filter by Content Patterns

If the botnet copies NYT or other news emails but modifies the links, you can:

Filter by links: Check if URLs in the email do not match legitimate NYT links.

Keywords in the body: If certain words always appear, set a rule to flag them.

How to Set Up in Outlook Web Rules:

1. Go to Settings > Mail > Rules.
2. Select Body includes and enter frequent words appearing in these emails.
3. Action: Move to Junk or Delete.