As a photographer by profession, I'd say it's a difference in color balance. Quite common with films already, and with different monitors and everything nowadays, I wouldn't consider it a catastrophe. Different monitors show in different ways, different sends send in different ways, received in different ways by different receivers, and looking with different monitors these receivers may see very differerent. THAT'S precisely why pro's are so careful about everything: you have to send the right red, and the receiver has to have the right red to come through. Otherwise it's like singing blaah but receiver gets bleeh...
You might try to send it as a plain image, even as a .zip, thus it might get through as original as possible?
"What you send, is not received". There may be something with settings, but I doubt this can be 100% secured. Unless through professional channel. And I wouldn't even trust those.
Color balance and alpha and everything have to fit.
It's very tender. But it makes the art of photography still live. In a way, Ansel Adams had it easier, even if he had it much tougher. But labor still goes on, perfection sought by every serious soul hasn't still been found, but we struggle - don't we?
What to do, I don't know. Just keep on taking good pictures. "The decisive moment" etc. In nature photography, Danish Jesper Christensen has taken some marvelous pics. I have him in Google+ I'm not so good in sharing... but if you find him, he has some great takes..
Jolly good, what you have there. Love of beauty, of massive structures, sensitive lines, be they natural monuments or insect made or man made Colosseums, they are remarkable! Let us marvel them! Small lines or big buildings, just beautiful!
We have so much beautiful. Cherish.
Dearly,
Pauli