Write a short German email urging user to sign in to STRATO due to the domain is getting expired or deleted or discconectedin HTML format. Please use for email like [email:] and for domain like [emaildomain:] - this are macros.
Generate a *unique subject line* on the first line, prefixed with "Subject:". 
Then provide the email body. Use placeholders [email:] and [emaildomain:]. 
Use paragraphs, bold, and line breaks so it looks well formatted in HTML.