From now on it's possible to directly export your emails to MailChimp. When using this function a new template is created at MailChimp and all images of your HTML email are uploaded.
From this template you are able to directly start your campaign.
Create a new connection first to give access to your MailChimp account. More information about the procedure can be found in the online help of Responsive.email Studio.
Unfortunately custom fonts are currently not supported by MailChimp, so for the time being a workaround is in place.