lost email settings

my droid has lost my email settings. tried shutting down & restarting, tried pulling the battery, finally reconfigured my msn mail accts and will not let me reconfigure my yahoo account. which, by the way, is still showing 9 million responses in the mailbox on my computer for every one i send on my droid (well, maybe it's only 900). thought that the last upgrade was supposed to fix the yahoo issue..... i'll keep trying....

Have a phone you love? Get up to $500 when you switch and bring your phone.