I am trying to find a solution to strip e-mail headers out of externally sent mail. I am in a very large corporate environment and some sensitive data gets sent via e-mail. The header information is telling the other party too much info about our IP addresses and server names. Security in this area is imperative. A lot of information points to the firewall level or implementing a proxy server. One suggestion was to masquerade the domain name in Exchange(which is good but doesn't accomplish what I need in full). There are some 3rd party software titles available. I am in a Microsoft environment and if I can use a Microsoft product I would like to keep it at that standard. Does Microsoft's IAS provide header stripping for externally sent e-mail? Or is there are good proxy solution anyone knows of? Any help would be very apprieciated.