2017-08-15 21:10 GMT+02:00 Eli Schwartz <eschwartz@xxxxxxxxxxxxx>: > Oddly enough, I use Thunderbird, which displays HTML mail fine, and > viewing the message source tells me that message was formatted as > (mangled) plaintext. The one I sent first, from my phone, clearly has the header for "multipart/alternative" and then after the delimeter we have "text/html" and "quoted-printable". My first response to you, and this one, are sent as text/plain from the web interface. Just to be sure, I checked my original message in Thunderbird as well and I think it's still fairly readable. It's actually very close to what all quotes on this list looks like in Gmail so maybe it's just that I'm used to it.