Here are some common cache control directives used in email marketing:
- no-cache: Forces the browser to revalidate the resource with the server. - no-store: Prevents the resource from being cached at all. - max-age: Specifies the maximum amount of time a resource is considered fresh. - must-revalidate: Indicates that once a resource becomes stale, it must be revalidated with the server.
Understanding these directives can help you optimize the delivery and display of your email content.