as the result of some configuration changes, the <member>@opensuse.org mail addresses were temporarily broken. The breakage started yesterday around 15:30 and was fixed today around 9:15.
As a result, mails sent to <member>@opensuse.org in that timeframe were rejected by mx2.suse.de with Recipient address rejected: User unknown in virtual alias table
In the meantime, the <member>@opensuse.org addresses are back to normal.
Note: this issue is _not_ related to the security breach Richard announced today.