We wanted to keep you updated on a few issues that may have been impacting your groups over the past few days.
Digest Delivery: Several users have recently reported issues with the delivery of daily digests. Digests were not being delivered unless a group hit "25 messages," which affected some groups We have corrected this issue and all groups should be fixed by tomorrow (Thursday, April 9, 2009).
Delayed Messages and Bounces: Group members and moderators who receive their email through Verizon may not be receiving all messages, or may be receiving messages long after they've been posted to the group. Verizon has apparently been "grey-listing" mail from Yahoo! Groups. We have contacted Verizon to remedy the problem, but we are ultimately dependent upon them to resolve the issue.
If you feel as though your ISP may also be delaying the delivery of Yahoo! Groups mail, you can find the official list of outgoing mail servers here: http://tech.groups.yahoo.com/group/ygmailadmin/ This list will be useful when reporting the issue to your ISP as they will likely ask for the IP addresses of the mail servers that need to be "white-listed" to prevent future issues.
Once we have an update or confirmation from Verizon we'll be sure to share it with you all on the blog (http://ygroupsblog.com). In the meantime, thanks for your patience!
Yahoo! Community Manager