It sounds like he's talking about encrypted mail from people he doesn't know. I can't speak for others, but the proportion of email I get from strangers that r

It sounds like he's talking about encrypted mail from people he doesn't know. I can't speak for others, but the proportion of email I get from strangers that ranks high on a content-quality scale is approximately zero. Encryption status, encoding and MIME types don't seem to have much to do with it.