Hi,
After a machine address change at NLnet Labs, the SPF record for the
unbound.net mailing was wrong, in the past week. This gave bounces
since last Saturday. The issue has been resolved: the SPF record has
been fixed, it should have propagated through caches by now, and users
whose subscription had been disabled due to these SPF bounces have had
their subscription reinstated. Our apologies if you have missed one
or more emails (there have been no security announcements in this period).
Best regards, Wouter