This is what my mail client tells me about the latest mail Twitter sent me: Criticism of Twitter’s copywriters? Not exactly, no. Mail.app is looking for some textual content near the top of the mail to display to me as preview text. It can’t find any in this mail, so it’s telling me the message has no content. Looking at the mail it’s a standard multipart mime message...
January 22, 2016
This message has no content.
22January