Mails deleted in android gmail app are not deleted from server I have installed android on my HT device.. when I delete the mails from android gmail app, they are still available on server and i can see them using gmail web page..

can anyone give me solution?

happened again after flashing the ROM again and restored with titanium backup :(
Are you using the gmail app or the HTC mail app? 

The first one, gmail app, will have everything synced right away. 

The other option, using HTC mail will be using a pop/imap account for accessing your Gmail. In that case you can update the pop/imap settings in your gmail account logging in with a browser and going to your settings. There you can choose if you want messages to be deleted or not.