I've got a qmail system in my firewall that's sending email out for my whole network. Unfortunately, some of the recipients are checking all the received headers and telling me that a.domain.com doesn't exist even though it was relayed through domain.com which _does_ have a valid DNS name. I'm not sure I understand all the documentation on tcpserver and RELAYCLIENT but I was wondering if this is the correct route to go? Basically, since it's a private network I guess I need to either remove the offending headers or rewrite them to eliminate the private hosts. Thanks for any tips -- Matthew Harrell Behind every great computer sits Bit Twiddlers, Inc. a skinny little geek. [EMAIL PROTECTED]