I'm curious if anyone else has received these. They seem to be originating from "hotmail accounts" (probably made up) and have subject lines of:

Re [15]
Re: [27]

etc.

What's interesting is that they contain a single gif with it. Now it's one of two things:

- a worm trying to propogate (using strings on the file didn't provide me with anything and I don't want to open it on Windows so I'm going to check it out in linux later)

- trojan bound to the image (see point above)

- a spammer verifying an address and trying to by-pass any filters