You mean like the mail I just fished out of my box that starts like this?
To: snowhare(_at_)nihongo(_dot_)org
Subject: Welcome to Wells Fargo Online®.
I'm glad to know that it wasn't English. Or important.
Hey, if Wells Fargo can't be bothered to follow the standards, I don't need to
do business with them. It's like those web merchants that won't accept an
email address with a + in the local-part, even though it's perfectly legal.
Keith
p.s. to allow for the occasional glitch, my filter looks for five consecutive
non-ascii characters before declaring the message broken.