I get messages that my e-mail was undeliverable or domain has expired. WHY? It's aggravating!!?

I send out e-mails daily for a business. Sometimes I get these messages back that certain addresses were undeliverable. WHY? When I may have sent one the day before. It's driving me crazy and sometimes people are missing important messages. If it doesn't stop, then I will have to use an address from our provider and cancel this yahoo address.

Yahoo is still having some problems at the moment. If you look you will find lots of people cannot send/receive/delete mail at the moment. I was advised to uninstall Javascript and then reinstall the latest version from http://www.java.com/. You could also try http://www.adobe.com/go/getflashplayer for the latest Flash player. This worked for me. If it does not for you then apparently it's only in the all new version. Try returning to the Classic version for now. Good luck use this link to get back http://us.mg1.mail.yahoo.com/dc/optout?s...