Aaryan Bhagat writes:
When we unsubscribed a user after sending a probe. We currently remove it from the list's roster. Let's suppose the email is resubscribed. Will the discussion the email has posted earlier will remain there or the account will start fresh as any other new account?
Anything that is posted by anybody, and is distributed by the mailing list, is out of Mailman's control thereafter. Theoretically we could go into the archives and remove posts of an unsubscribed email, but we don't. And even that is not certain; the archive may not be under control of the same host or organization that owns the Mailman server itself.
Also, the fact that an email goes bad doesn't mean the user doesn't exist. Email addresses are virtual, users are real. Users do abandon or lose the right to use email addresses (eg, my university purges student addresses a few weeks after graduation -- I think that's stupid, but what do I know? :-รพ).
If you're referring to GDPR "right to be forgotten", no, we don't do that either, although some folks have suggested we should. But that wouldn't be triggered by unsubscription: it would have to be an explicit request by the human user, not an auto-unsubscribe due to excessive bounces.
Steve