Umbraco V6.1.5

I'm trying to insert some HTML from some old blog posts into the bodyText field (RTE), but all of the tags, spaces and line returns are getting stripped out. The tags are the normal <b> so nothing that tinyMce should be stripping.

var contentService = new ContentService();

var post = contentService.CreateContent(postTitle, blogSection, "NewsArticle");

post.SetValue("bodyText", postData);
post.SetValue("articleDate", postDate);
contentService.SaveAndPublish(post);