For those who do not have a build in spell checker to check the spelling of posts, I found iespell checker quite valuable. After you are done with your post and before you hit send, you can either right and click on spell check, or hit the tools button and click on iespell.

It is a small utility program for Explorer that you can download for free from [You must be registered and logged in to see this link.]

Purely download, install and there you go.