I've had my droid for a few months and have had no problems with my yahoo mail until now (except sometimes the mailbox wasn't in sync with online mailbox). Today suddenly all messages sent from my phone via yahoo didn't send the text I typed, but instead replaced it with a random email I had received on that account! In other words, I tried to email a friend and somehow the text she received was an email I had gotten from my father and not what I typed to her at all. (And that was the least embarassing.)
I rebooted the droid, and the test email I sent a friend came back blank, so that's an improvement. I've had no problems sending email from yahoo via the internet on my work computer, just the phone.
Any ideas on solving this?