Small subset my arse!
> "We have actively taken measures to protect against a spam campaign that impacted a small subset of Gmail users."
I had dozens of them. They came complete with a (brand new I assume) banner stating that "We can't confirm that you sent this message or not, headers may have been forged".
They have since updated the banner to say the message "seems to be a fake bounces reply to a message I didn't actually send".
From inspecting the message source it seems they spoofed a lot of things, including Message-ID formatted google-style that might have been what tricked Google.
Biting the hand that feeds IT
