Reports come from Google Groups that Yahoo! Group emails are not being delivered to Gmail users.
The first post came in March 16th and said:
I haven't been getting all my mail from my Yahoo groups. They're not bouncing just not getting though although I can see them on the group's message archive. Ideas?
On March 19th, GmailGuide has confirmed the issue to be on Google's side:
We have worked with Yahoo Groups to resolve this issue. You should now be able to receive messages from Yahoo Groups in your Gmail account.
Thanks for your patience,
Also, Yahoo! has confirmed it is on Google's side:
We've had reports that some users with Gmail accounts have not been receiving Groups mail since approximately March 14, 2007. This was a difficult issue to diagnose, because we were able to replicate the issue with some, but not all, of our test Gmail accounts. Some of us were missing Groups messages in our Gmail accounts, some of us were receiving them as usual. We appreciate those of you who wrote in detail about the problems your members were having on the Groups Technical Issues board and in email to Customer Care. Having detailed information helps us get to the bottom of issues faster.
The problem appears to be on Gmail's end. We have gotten in touch with the Gmail team and are working to resolve this issue. We'll post an update when this has been resolved.
Is it resolved? Supposedly not, even thought Google says it has been.
Continued forum discussion at Google Groups.