Explanation
Email-to-case is a channel that meets the requirements of logging the case thread and storing attachments to the case record. Email-to-case is a feature that allows you to automatically create cases from incoming emails sent to your company's support addresses. Email-to-case preserves email formatting and supports HTML emails with embedded images. Email-to-case also captures email attachments and adds them to the case record. Email-to-case tracks the entire email conversation between the customer and the agent, and logs it as a case thread on the case feed or case comments. Verified References: Service Cloud Consultant Certification Guide & Tips, Email-to-Case Overview

To measure the effectiveness of two-way mobile messaging, the Average Handle Time (AHT) metric is suitable. AHT assesses the efficiency of conversations and problem resolution through messaging, providing insights into how this channel impacts support team performance and customer satisfaction, helping to evaluate the success of the implementation.