I've recently switched to SUP from MUTT. 

I've followed the 'Complete gmail configuration' wiki post and set my gmail account with offlineimap & sup successfully. But when I delete some mails in the INDEX view with 'd' key, they just disappeared but still on the server. After flushing changes and polling manually, they were still there. How could I move them to the Trash on the server after deleting them in sup?

ps. My sup & offlineimap setting is the same as the wiki post.

Thanks.