firstly, you should wait more then 11 minutes for an answer to your question.. Secondly, your question likely has been answered 30+ times, using the search feature on the site will help find answers..
First of all you have to save the pic from your email.. Right click on the pic and select, 'save as'.. Once you have it saved onto your comp, open up
www.ssnakess.com (if not already opened) click on 'Gallery'.. Now you just have to click on, 'upload photo' then go to 'browse'.. Find the SAVED pic and upload it.. Then you can post it...
-Matt