And yet, it shouldn't be. The only reason 100 Mb is too small is that people are so fond of sending attachments. We have to do it because of the restrictive document repositories, but some people go beyond what's necessary and make an art of sending gratuitous attachments.
"The only issues I have with the attached documents is the below."
I was the one who sent you the attachments! I don't need to receive an unaltered copy in your reply email! Another 700 Kb down the drain.