It's not clear, from your post, exactly how the pictures have been blocked. I assume that your work's email server is refusing to accept jpeg attachments, sent to the address you're trying.
You could try putting the pictures into a zip file, to see if the server would accept that.
Or you could upload the pictures (again in a zip file) to somewhere like YouSendIt.com and then send the office a link to the downloads. The problem with that method, though, is that your work's IT system is probably set up to deny access to file downloads.
The simplest solution would be to put the pictures online somewhere. If there are just a few pictures, you could upload them, one by one, to TinyPic:
http://tinypic.com/
and then send the links, in an email, to your office.
If there are more than a small number of pictures, you could create a free online gallery at one of theses sites:
http://www.webshots.com/
http://www.flickr.com/
http://www.pbase.com/
Then you could just email the gallery URL to the office. Of course, that assumes that your office has web access (and not just email). If there's only email access it's unlikely that you'll find a way around the constraints imposed by the company's IT team.
Chris