# Email Filters Reference

Use these Gmail search operators to refine your email query:

*   `from:sender@example.com`
*   `to:recipient@example.com`
*   `subject:keyword`
*   `has:attachment`
*   `newer_than:Xd` (X days)
*   `older_than:Xm` (X months)
*   `is:unread`
*   `category:promotions`