Today I have received the following mail from Mailchimp:
Our automated abuse-prevention system, Omnivore, has detected an action or content in your account that may be in violation of our Acceptable Use Policy.
For more information on these violations, please review our Acceptable Use Policy.
Since not many people have been using newsletters anyways, and I don't wish to have to deal with user's personal data in order to send emails as explained in my previous post I have decided to delete my Mailchimp account instead of having to figure out what policy my blog violates.
If you wish to continue receiving updates from this blog, I suggest you start using RSS instead, or use on of the many services offering newsletters from RSS feeds.