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I've had a new galaxy S3 (from Verizon) that spontaneously deletes the contents of my e-mail (Comcast) without my input at random times during the day. Exchanged for another phone - same issue. Does not affect my gmail or Yahoo accounts. Verified by Comcast that POP3 is necessary. My Droid X nor HTC Incredible nor HTC Incredible 2 never did this.

Ideas? Maybe the S3 isn't so good after all. Samsung tech support ( 4 calls) don't seem to care. Verizon Tech support is stumped.

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So random individual emails are being deleted? Maybe it's an issue with POP3? Have you tried alternative email apps like K9? play.google.com/store/apps/details?id=com.fsck.k9 –  Bryan Denny Mar 19 '13 at 19:24
    
A propos "alternative email apps": You did not specify which app you use. Could it be the app? Did you use the same app on the other devices? Could it have to do with the setup (unlikely, but not impossible)? –  Izzy Mar 19 '13 at 20:48
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POP is primarily a client-based protocol, meaning that the default behavior is for each client (your phone in this case, perhaps Outlook on a PC at home) to download messages from the server. This means that the first client that connects to your account with take all email messages it sees. Then, subsequent checks by other clients won't be able to find anything on the server because all those new messages are now stored only in the first client. POP clients can be configured to "leave a copy of messages on the server," which is highly recommended if you want to use POP on multiple clients/devices.

This sounds like you've got one or more clients connecting to your account that aren't set to "leave a copy of messages on the server," which means they're stealing messages out from under your phone. From your phone, this would look like they're disappearing. The easiest way to test this is to change your email account's password, then only put that updated password in your account on your phone. If the mail stops "deleting" then you can use a process of elimination to identify the culprit client.

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