Section - [7] How do I view JPEG images posted on Usenet?
Image files posted on the alt.binaries.pictures.* newsgroups are usually "uuencoded". Uuencoding converts binary
image data into text that can safely be posted. Most posters also divide large posts into multiple parts, since some
news software can't cope with big articles. Before your viewer will recognize the image, you must combine the parts
into one file and run the text through a uudecode program. (This is all true for GIF as well as JPEG, by the way.)
There are programs available to automate this process.