John Fleming said: > I've switched from unstable (via Knoppix) to testing. I'm using Postifx > as > before. The last line in my mail headers is an X-UIDL header (see below) > that I hven't seen before. Any idea where this is coming from and how I > can > affect it? Thanks - John Google found this: http://news.spamcop.net/pipermail/spamcop-geeks/2002-October/002842.html