An email archiving solution designed for SMEs of 5 to 2,000 users, which is implemented as on-site software in a Windows environment. Low maintenance and hardware requirements. Easy to install and with first-class support from MailStore, respectively value-added distributors. MailStore Server® enables customers to comply with legislation and regulations regarding email archiving. MailStore Server has been successfully used by tens of thousands of companies in more than 100 countries and in various sectors.

Target: SMEs from all sectors. Especially IT administrators, IT managers and small business owners.

Advantages for you company

  • Compliance assistance
  • GDPR compliance assistance
  • Extremely fast content search for emails and attachments
  • Complete protection against data loss
  • Reduced workload on email servers
  • Save up to 70% on storage space
  • Simplified backup and restore
  • Independence from heavy PST files
  • Elimination of mailbox quotas

Main features

  • Flexible archiving for specific company needs
  • Scalable archiving technology
  • Compliance specificities
  • Quick access for all users
  • Any email can be retrieved from the archive using standard file formats, guaranteeing the company’s independence in the medium to long term

What's new in version 23.1?

  • Retention policies: support the inclusion or exclusion of certain files
  • Storage and export: thanks to the new OAuth authentication (via Microsoft 365 operated by 21Vianet)
  • Directory services: allow users to be synchronized (via Microsoft Graph API). Synchronized users can be directly authenticated (via Microsoft 365 operated by 21Vianet, with OpenID Connect).Find out more at

System Requirements


  • Operating System: Supported Microsoft Windows Desktop or Server operating system
  • Processor: Intel Core 2 Duo or compatible CPU @ 2GHz for até 25 users or 1 000 emails/day; Intel Core 2 Quad or compatible CPU @ 2.4GHz for até 75 users or 2 500 emails/day; Intel Xeon Quad Core or compatible CPU @ 2.4GHz até 500 users or 14 000 emails/day
  • Main Memory: 4GB (to 250 users or 7 000 emails/day) 6GB (to 500 users or 14 000 emails/day)
  • Hard Disk: To 75 users or 2 500 emails/day 150 MB disk space required for installation. To 500 users or 14 000 emails/day 150 MB disk space required for installation and a minimum of two separate disks is recommended.

Supported Operating Systems

  • Microsoft Windows Vista SP2
  • Microsoft Windows 7 SP1
  • Microsoft Windows 8.1
  • Microsoft Windows 10
  • Microsoft Windows Server 2008 R2 SP1 and 2008 SP2 (Foundation, Standard, Enterprise, Datacenter)
  • Microsoft Windows Small Business Server 2008 SP2
  • Microsoft Windows Small Business Server 2011 SP1