Rejected; mail logging is necessary for the mail system to work correctly. And we cannot anonymise the addresses in the database because that will break the retry functionality.
It's best that we rely on the policy that "unsubscribing does not mean purging", and that if people want their e-mail addresses purged, then they should contact the staff.
System message - Issue updated
It's best that we rely on the policy that "unsubscribing does not mean purging", and that if people want their e-mail addresses purged, then they should contact the staff.