That’s pretty useless. It should, at the very least, be a fully qualified URL to the picture. Preferably, it should be attached to the e-mail. Depending on the size of the attachment, I could imagine there being a cut off, above which the file will not be attached, but only linked for easy viewing in the browser.
The poll didn’t get a lot of interest, but 3 of the 4 voters selected 2000, so that’s what I’ve set the limit at for now. We can, of course, revisit if need be.