For the last week or so, I have been receiving a flurry of blank emails - nothing in the sender’s name, message title, or message body. I’m talking 10-15 EVERY DAY in two different email addresses!
I normally use Thunderbird to retrieve my mail, but I’ve been going directly to my ISP (Comcast) so I can at least report the offending emails as spam (not that that has helped any). When I get the mail from Comcast directly, the sender’s name just shows “Unknown Sender”.
I also get these totally blank messages periodically. I thought they were being sent by someone to check if the email address is live – an invalid address would generate an error. This would (probably?) require a valid return address on the message.