I live in a city in northeastern Brazil where the prevailing winds blow from the sea to the land. From March to May, the air is filled with butterflies, creating a striking natural spectacle. Curiously, these butterflies mostly fly against the wind, heading towards the sea and seemingly aiming for Africa, despite no nearby islands. It's an annual phenomenon that remains a mystery to me... a butterfly on an endless journey.
In my case, I had these spam-invites sent from my G Suite email to my personal Gmail. I could see the emails on the Sent folder.
The weird part is that I had a strong password (1password) + 2-factor on both accounts. I use FF with containers so I only use my email on a container and nowhere else.
I had reviewed all the 3rd party apps and security settings on both accounts and it all looked normal to me. The only issue is that I didn't had the SPF, DMARC and DKIM setup - fixed after it.