Hi, According to RFC, http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html It said: To mark a response as "never expires," an origin server sends an Expires date approximately one year from the time the response is sent. HTTP/1.1 servers SHOULD NOT send Expires dates more than one year in the future. But if a server set an expire say 10 years from now, will squid handle it correctly or just neglect the expire? Thanks