Privacy and Email Providers

Don\’t know if this makes sense, but if you try sending an email on gmail,
with the word \”attached\” in your email body, gmail will always hold on
sending and propose that you consider whether you want to attach a file.
This seems a bit unsettling, does this mean email providers actually peruse
the content of the emails prior / during sending?

I know we agree to terms, but doesn\’t it go against privacy policies?