The X-Primary Email Header is a custom header field in email communication that helps categorize and route messages. It can be used by email servers or applications to provide additional context or actions for processing incoming messages.

The X-Primary header serves as an identifier for a particular category of emails. By implementing this header, email systems can automate sorting or trigger specific actions, such as applying filters or prioritizing certain types of emails.

Note: The X-Primary Email Header is not a standard header in email protocols but can be defined for specific use cases or internal purposes.

  • Common use cases include:
    1. Filtering emails based on priority.
    2. Routing messages to different departments.
    3. Marking emails for follow-up or review.

Here’s an example of how the X-Primary Email Header might appear in an email message:

Header Field Value
X-Primary Priority
X-Primary Review