What is the default number of days for message retention in the system?

The default number of days for message retention in the system is indeed set to 30 days. This means that any messages that are processed or generated within the system will be stored for a period of 30 days, after which they will be automatically deleted unless specific settings change this retention policy. This duration is typically established to balance the need for retaining messages for auditing and data retrieval purposes while managing storage effectively. Retaining messages for too long can lead to unnecessary consumption of system resources, while too short a retention time might hinder users from accessing important historical information. Therefore, the choice of 30 days serves as a sensible compromise to cater to both user needs and system efficiency.