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Ok, now, please click on the link below and login to your yahoo mail account....
It will switch you automatically back to Classic.
See if you can view your messages alright now.
No. I am still missing several pages of my Inbox.
Are you in Yahoo Mail Classic now or Beta?
I have been using Mail Classic and have tried switching to the Beta because I read that might be the way to recover lost messages. So far it does not seem to have made a difference.
The messages are missing in both Classic and Beta.
Ok, are you using any email program to retrieve your yahoo mails?
Did this happen automatically?
Yes. What I noticed first was that the buttons to go to previous pages would not work. Then everything other than what just came in and would show on one page disappeared.
Hmm....sorry , I'm running out of ideas....this could be a browser issue. I'll opt out now and send you question over to a specialist Mac Expert.