What feature allows for the monitoring of SAP MDG mails?

The feature that allows for monitoring SAP MDG mails is found in Transaction SOST. This transaction code is specifically designed for monitoring the status of all outbound correspondence in the SAP system, including emails generated by processes such as workflows and notifications in SAP Master Data Governance. SOST presents a comprehensive view of email messages sent from the system, allowing users to check the delivery status, view any error messages, and manage the email queue.

In contrast, other transaction codes serve different purposes: SWDD is primarily used for workflow design, SCOT relates to the configuration of email and network settings, and SE80 is a workbench used for development tasks like programming and object management. Each of these has its unique functionalities that do not focus on the monitoring aspect of outgoing emails, which is why SOST stands out as the correct answer for this question.