I got my droid eris last Feb. 2010. I was always able to retrieve my POP yahoo mail, but it never worked like it should. Then one day a couple of weeks ago, it started working correctly, meaning I would hear a notification sound, the phone would vibrate and there would be a green number on the mail icon on my home page. I don't know what setting I changed, but it was working. Then I decided to get a Mail Plus yahoo account so I could store all my emails in my Mail program on my Mac. I set up it up and all was working. Then the 2.1 software update came through last week. Mail was not working correctly, so I reset up the yahoo account. The phone did it automatically and I noticed now it's using an IMAP and android.imap.mail.yahoo.com server address. I could retrieve my email OK, but again, it did not work as I expected. Now, in the last 2 days, it is deleting mail from my server when I delete the mail from my phone. There WAS a setting that said Never Delete from Server in the Send/Receive setting area, BUT NOW THAT IS GONE! Anybody have any idea what is going on? How can I fix this?