My Droid Bionic retains all emails in both my verizon.net and msn.com e-mail accounts. I have tried to erase the older ones by moving them to the trash directory and then emptying the trash bin. But they then show up again in my inbox as new mail. I went to a Verizon store for technical help, but the techs there couldn't figure out how to get rid of them either. Where is the setting that would automatically delete emails over, say 30 days?