They don't know they know nothing about it until they read the post. I look at a lot of posts here at Bleeping Computer. Based on the subject title it may look like something I can help with.
There are other things which can cause email to be stuck in loading. Some of those things I and others may be able to help with, however, we won't know if we can or not until we read the specifics about the issue.
You did not answer the questions I asked in my previous post.
As an alternative, he could send it to you through Hightail (formerly You Send It). There is a free option-scroll down the page and click Sign Up under Lite.
He enters your email address, uploads the file, you receive an email that the download is available, you click the link and download.
I used You Send It for years for file sending. After they changed the name to Hightail, I still use it.