Haven't checked in a while, but we can't receive any .zip, .rar, etc. in emails here, but can send them, which is useless if sending internally.
They had some ridiculously low email attachment file sizes when I first came here, I got them to go to 10MB, that's most likely what it is now.
I put large files to share on the network and send a link (which IT has it where it cannot be clicked on), either they figure out how to get it or they don't.
Being retirement age has it's perks.