Here's a weird email but IMO the erorr is just the odd strikethrough. Bill T. explains: "From my Comcast email spam folder. It was smart enough to detect it was spam, but... spam from a trusted sender? And either the delivery truck is an emoji (possible), an embedded image (maybe?), or Comcast is not actually blocking external images." I'd like to see the actual email, could you forward it to us? My guess is that we're seeing a rare embedded image. Since embedding images was the whole point of MIME in the first place, I have found it odd that they're so so hard to construct with typical marketing mass mailers, and I almost never receive them.