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I just tested it and found your new pages returning a 200, what status code was it returning before

Nick Kellet at List.ly reached out to let me know move about the service. He gave me permission to copy and paste his email below. From Nick... "I'd love to fill you in on the details of Listly and SEO Sure we offer iframes, and embed, but they are really secondary options.Our first choice is to use our Wordpress plugin, which means a list embedded in a post is treated as part of the post. ie your content is SEO searchable.Wordpress is just a first stop in executing our full vision for Listly.Crowd contributions ensure your post is ever changing, we know that brings significant impact to search results.This changes the lifecycle value of a single post from an SEO perspective.I'd be happy to share more and give you some examples of what this means in terms of organic search.I'm you'll be impressed and curious.We also have some great local search examples too.The anchor text is controllable from Listly. List items on your lists are freely nameable."

Hi Mark, If the newsletters aren't adding to your site in any beneficial way (long term, after they have been sent), you could always choose to have them not indexed in Google. However, having had a quick look at your newsletters and Share Point Community as a whole, these links won't affect your site. They are based around online marketing, tools etc. I wouldn't worry too much about it. You're only linking to trusted resources not dodgy sites. Cheers