Standard email to case is a feature that allows you to automatically create cases from incoming emails sent to your company's support addresses. Standard email to case can handle emails with attachments up to 25 MB in size (minus any text in the email). Standard email to case also preserves email formatting and supports HTML emails with embedded images. Standard email to case is suitable for creating 4000 - 5000 new cases a day, as well as allowing customers to attach documents under 25 MB by email. Verified References: Service Cloud Consultant Certification Guide & Tips, Email-to-Case Overview