Try Irfanview, which will let you resize accordingly. Some of my JPGs are up to 7MB in size (Nikon D200) and most ISPs cough at that. A quick resize will often bring it under 250KB. If you have Photoshop, use the "Save for web" option. many other graphics packages will do something similar, but good old Irfanview is free and is an indespensible piece of software for camera owners.
Another thought - Photobucket. Get a free account and you can upload to a website and let people see your offerings there.
Away for a few days at Fairford, (Taking yet more Pics...) but you will solve your problem easily using any of the above.
Conan