There have been similar reports on the forum and one of the common things is that all the users used Apple devices such as iPhones or iPads to access their email and when BT checked to see which device triggered the deletion it was inevitably the Apple device that triggered the deletion.
If you have checked and the emails are not on the BT servers when you use webmail it means that they are gone and can not be recovered by BT.
Not much use now but in future do not use the email sent folder as a storage folder. If you have emails that you want to keep you should set up a new folder and store them there or better still download the emails to your device and store them in a folder there and include it in your back up regime, assuming you have one.
As regards the CS Agents comment about if you had used the BTMail app they could get your emails back. That is a load of rubbish. Regardless of which email app you use, if the emails are not on the BT servers when you check via webmail it means they are gone and can not be recovered.
