Posting from Mailchimp Newsletter

Hello team,

We use Mailchimp newsletter to send email to our clients. I tried to use this plugin for direct post via email but it doesnt work. The only thing that works is posting as plaintext( Mailchimp send plaintext email also).

Is there any addon that fixes this?

Thank you in advace!

Best regards

The page I need help with: [log in to see the link]