Acknowledging email/internet parameters are functional when attaching, in any fashion, jpegs of 6GB+ they are being received as 70KB attachments? Have i missed some setting?

Having issue with sending jpeg attachments. Acknowledging that all my email/internet providers are functional and the usual parameters have been checked I currently have the following concern. When attaching, in any fashion, via all methods, jpeg files of 6GB+ they are being sent and received as 70KB+/- attachments? Have a I missed some simple setting or is this a function of iPhoto. I can send the same full size jpeg attacments via Windows based laptops usuing same services, same location; and have had no previous issue using a previous Windows PC.

Appreciate any input.

Oatser