Plugin:Postie

Hi

I am trying to use Postie. I am posting many posts a day to the site as drafts, but I want to future date them all to a date far into the future. This will keep all my drafts together.

I’ve tried using the date flag in the body of the email as follows:

date: 2013-12-31
date: 2013-31-12
date: 12-31-2013
date: 31-12-2013
date: 31/12/2013
date: 12/31/2013
date:2013-12-31
date:2013-31-12
date:12-31-2013
date:31-12-2013
date:31/12/2013
date:12/31/2013

But none of the above change the date on my post.

Can someone please tell me the correct format, or give me an explanation as to why it might not be working.

Thanks!
Brett