I have a html email which is looking like this: http://daarat-tawheed.co.uk/wp-content/uploads/2013/08/seminar.html
and I want to send it via my wordpress newsletter system and add it as a post but adding it as a post makes it look like this: http://www.daarat-tawheed.co.uk/?p=310&preview=true
How are the tables showing up like that and what can be done about it?