If people would post the hardware and software they are using with their photos hopefully someone would post the easiest way to resolve the size problem. When I email photos they are not reduced in size. I use a "Photos" software (from Apple) with a MAC computer.
As a side note there is a forum intended to practice things like posting photos,
https://www.fordbarn.com/forum/forumdisplay.php?f=13
Charlie Stephens