Respect Expires Header

Syntax: choose from drop down list

For Refresh-type walks, this controls how the Expires header is used. Set to No the Expires header will be ignored. Set to Limited the Expires header will be used, but limited by the Minimum Refresh Time and Maximum Refresh Time. Set to Yes the Expires header will be treated as definitive.

Invalid and out of range headers will be ignored, with the exception of "0".