we are going to physically move to a new building. I am running Exchange v6, build 6249. There will be a change of ip addresses for my t1, but i want to catch all the mail. My idea was to basically setup a mail server as a repository that catches all the mail on my old ip address on old t1, then sends it to my Exchange server that is sitting on my new t1 and new ip address in a totally different building. Is there a better solution? What would be a good piece of mail server software for this repository..either linux or win based ? How would i configure the Exchange server for this? FYi, i am using Brightmail on the exchange server.. in case this makes a difference.