[throwaway483284]

Disclosure Timeline

March 9, 2020 – Reported to Google security

March 10-19, 2020 – Assisted with steps to reproduce

March 20, 2020 – Resolved by Google as “Won’t Fix (Intended Behavior)”

March 20-31, 2020 – Worked to confirm that there were no future plans to fix

April 2, 2020 – Got confirmation that the team was aware of the issue and has no plans to fix

Sorry but this is just embarrassing. He wasted so much of his time and time of others while doing 15 sec of googling[1] would solve this.

[0] https://www.quora.com/Does-sending-email-from-Gmail-expose-y...