Google Product Forums
Re: My messages are being filtered to my trash and I have checked my filters and the IPOP settings.
Nov 21, 2011 8:40 AM
Posted in group:
Reading and Receiving Messages :
Gmail does not delete any messages from your account (other than Trash and Spam after about 30-days). If messages are missing it probably for one of the following reasons:
3. Settings->POP/IMAP (access from a client, phone, utility, notifier, etc)
4. Settings->Accounts->Change Account Settings->Other Google account settings->Authorizing applications & sites (access from a web-site, utility, etc)
5. Manually (even accidentally or not understanding the difference between labels/folders)
6. Compromised account (a sub-set of #5)
And I don't even know what the POP/IMAP settings are for...?
It allows other things (like your cell phone) to connect to your account and download/delete messages.
Was this a one-time occurrence, or is it an ongoing problem?