I think Google engineers must have been making changes somewhere, because something has changed in the service.
For over 4 years I have been using a rule in my Gmail that forwards certain incoming messages to a Google group.
It's a very useful feature - when I am on a client's site, I can usually access this group through most corporate security filters, whereas I might not be able to access my Gmail account to read these messages.
All of a sudden, I have stared getting this error:
Delivery to the following recipient failed permanently:
firstname.lastname@example.org [not a real email address]
Technical details of permanent failure:
Nested groups detected
Anyone know what/why this is?
I don't think I have ever used the nested groups feature of Google groups, but I am aware that it is/was advertised by Google as a benefit for their commercial apps clients. I know little else about it.