hmmm, I'm not sure, The K1 I have doesn't have a trash bin.
Also the K1 runs 3.2 not 2.3
My phone is 2.3 and does not have a trash bin for email but does have a trash folder in the email client. Once deleted it goes there. You then have to delete it a 2nd time in the trash file for it to go away.
Do you have an option to delete it in the trash file?
IT Specialist and Consultant Lenovo Tablet Evangelist Current Machines: IdeaCentre A300, and ThinkPad Tablet