Unless Lyude decides you need to be banned for something that happened in a different place multiple years ago, in which case your valuable contributions mean nothing and you're no longer allowed to contribute.
People keep trying to frame it like the ban was strictly for past actions from years ago, which I find disingenuous at worst and gullible at best.
If you're that upset about someone publishing a supposedly formal email that you sent, perhaps you should consider why that is instead of just knee-jerk banning the person to protect yourself.
The email said it wasn't up for discussion.