Any one help me with this problem please !! Ok, how do i get the 'HTTP_HOST' variable to allways be a specfic address rather than the one that is the current url ? For example, We are running some project management software that is web based and use's php, we have access to it inside work on a server, the server address is say http://195.192.1.1:80, we can also access it from home on a pass through which is say http://81.254.101.51:80, now the problem is if you work on a project from home and get email notification to your work email that a change has been made, php send out a mail with a link to click to see the changes made but that link is the http://81.254.101.51:80 link and not the http://195.192.1.1:80, so in work you cant click the link to go to the internal server because the 'HTTP_HOST' takes the link from where the web url is ? How can i force the 'HTTP_HOST' to allways be http://195.192.1.1:80 ?