In order to forward emails as attachments to an email via the CRM, you can drag and drop them as attachments to another email. The system then automatically generates an EML document that has the type "email", is "released" and compressed. The document has no reference to the original email.
EML files are text files additionally containing the header information or attachments and hyperlinks of emails. They are stored in a general format and can be processed, e.g., by Microsoft Outlook and numerous other email programs.