MailStore Service Provider Edition (SPE) is an email archiving solution designed for Managed Service Providers (MSPs) to offer email archiving as a managed service to their customers. The software is deployed on the MSP's own infrastructure, providing full control over the solution and client data. The product uses an instance-based architecture where each end customer receives a separate, self-contained MailStore instance that runs independently from other customers' instances. The solution supports two operating modes: single-server mode for MSPs with limited customers or users, and multi-server mode for scalability across any number of customers and servers. MailStore SPE creates copies of all emails in a central archive to ensure data availability and security. The solution supports journal archiving to maintain archive integrity and can archive PST files centrally. It includes compliance features to help customers meet regulatory requirements and GDPR obligations, with regular certification by independent data privacy experts. The platform provides a web-based Management Console and API for centralized administration of instances by service providers. Archive administrators can configure compliance settings and grant user privileges within instances. The solution offers branding options for MSPs to customize the visual appearance for individual clients. MailStore SPE supports various email systems and includes features such as rule-based email deletion from servers after archiving, de-duplication, compression, full-text search functionality, and one-click restore options for users.