I haven't figured out why our Verizon /yahoo email pages look different yet...

I found some stuff on the yahoo help site.
http://help.yahoo.com/l/us/yahoo/gro...WwKCu9yUoilyR4

and
[We no longer support direct replies to daily digest messages, in order to make the digest format more useful for everyone in the group by limiting difficult-to-read messages.

If you receive the new "fully featured" digest, simply click either the "Reply (via email)" or "Reply (via web post)" links that follow each message within the digest.

If you receive the traditional, text-only version of the daily digest, to reply to a specific message, you can do one of the following:

* Find the individual message on the group Web site and then click the "Reply" button that’s part of each message.

* Click the "reply" button on your email client. Then replace the "No Reply" address in the "to" field with the email address of your group. You should also remember to copy the subject of the message you're replying into the subject field (or the message won’t be placed in the correct topic) and to trim all the irrelevant quoted text out of your message (as a courtesy to the other members of the group to make the digest easier to read).]- http://help.yahoo.com/l/us/yahoo/gro...GwoGpi_RMilyR4


Here's the whole help page - where I found that info above-
http://help.yahoo.com/l/us/yahoo/gro...members/email/

you can click to expand each topic section, I would start at the top and work my way through the ones that sound like it might be what you need.