Email-to-Case is a Service Cloud feature that allows you to automatically create cases from incoming emails sent to your company's support addresses. Email-to-Case can handle emails with attachments up to 25 MB in size (minus any text in the email). Email-to-Case also preserves email formatting and supports HTML emails with embedded images. Email-to-Case is suitable for customers who provide digital pictures of their problems as attachments. Verified References: Service Cloud Consultant Certification Guide & Tips, Email-to-Case Overview