We want to acknowledge the reports that not all groups are receiving
email. Some of these groups are seeing the posts on their group
archive on the Web, but not receiving them via email. This problem has
been difficult to diagnose, since it is affecting some groups but not
others.
Our engineers have been investigating the root cause since we became
aware of the problem last night. We will continue to work on this and
will keep you updated via the Groups Team Blog:
http://blog.360.yahoo.com/y_groups_team .
In the meantime, we appreciate your patience and apologize for the
inconvenience.
The Yahoo! Groups Team