I am using Google's PageSpeed and as a result of that the ip address in the emails are Google's ip addresses. This part says it all:
PageSpeed Service serves webpages on your behalf to your customers by retrieving original content from your servers. As a result, all requests to your origin server will be from Google's IP addresses. To get the IP address of the user on your origin server, we recommend you use the value stored in the X-Forwarded-For HTTP header.
Would it be possible to change this?