Advanced Spam Filtering Options: Mark bulk email as spam Threshold: {1} Fix the issue To make sure that bulk messages like ...

Advanced Spam Filtering Options: Mark bulk email as spam
Threshold: {1}

Fix the issue
To make sure that bulk messages like this won't be marked as spam in the future, adjust your advanced spam filtering options on the spam filter page (opens a new window). You can do one of the following:
If you're not getting messages from a specific sender, we recommend adding their address or domain to your organization's sender allow list.
If you're not getting messages from several domains, you can adjust the Bulk email threshold to be less aggressive. Note that increasing the bulk email threshold makes it more likely that your users will receive unwanted mail from other senders.
Wait 15 minutes before making sure that your change was successful.

Helpful Links

What's the difference between junk email and bulk email?
Advanced Spam Filtering Options