MailStore Version 26.3 now available

New Web Access feature for MailStore Server and the SPE, and improved bulk imports and Service Admin for MailStore Cloud

Viersen, 08.07.2026 +++ The German specialist for email archiving, MailStore by OpenText, is today launching the latest version, V26.3, of its MailStore email archiving solutions. The update for MailStore Server, the MailStore Service Provider Edition (SPE), MailStore Gateway, MailStore Home and MailStore Cloud, brings important improvements for users:

New Features in MailStore Server and the MailStore SPE Version 26.3

Up to Ten Emails Can Be Resend at Once in the Web Access

Using Web Access has been made significantly easier in MailStore Server and in the MailStore SPE: Whereas previously emails could only be resent one at a time, you can now select up to 10 emails at once and resend them. This noticeably speeds up the recovery process and makes working with multiple emails much more convenient.

MailStore Connects to the IceWarp Maintenance API to Synchronize and Authenticate User

The IceWarp integration has been modernized in MailStore Server and in the MailStore SPE to improve reliability and compatibility. Because the previous API was no longer supported and caused synchronization issues, it has been replaced with the new SOAP API. This update restores stable and automated user synchronization, ensuring a dependable connection between MailStore and the IceWarp environment.

New Features in MailStore Cloud Version 26.3

Easy Bulk Imports

New import capabilities make it much easier to handle large-scale email imports and streamline the migration of existing MailStore Server and MailStore SPE archives to MailStore Cloud. First, we expanded the import space to 1 TB, which allows customers to upload zipped email files from third party systems and exports from other MailStore products. Second, we have further automated the import of multiple ZIP and MSZIP files, which eliminates the need for manual intervention. MSZIP files, which are digitally signed exports from MailStore Server and the MailStore SPE, ensure that archived metadata — such as the original archiving date — is transferred accurately and reliably to MailStore Cloud.

Secure User Registration and Password Reset

The registration of new user accounts and password reset processes have been significantly improved and modernized. Instead of sending login credentials, users will now receive a secured registration link. Users and administrators can easily activate their accounts themselves using these links and set their own passwords immediately upon their first login. Password resets also work this way. This not only makes the entire process more secure, but also significantly easier and more user-friendly.

Service Admin – Remote Administration by Managed Service Providers and IT Resellers

The Service Admin (aka Reseller Admin) is specially designed for Managed Service Providers (MSPs) and IT resellers who manage MailStore Cloud organizations on behalf of their clients. This new user type does not require a separate user license. At the same time, data privacy is maintained, as a Service Admin never has access to the contents of their clients archive mailboxes. Partners can activate a Service Administrator conveniently on the MailStore Business Partner Portal or via the BP API.

Updated Certification: Meeting Data Privacy Requirements

As usual, Version 26.3 of MailStore Server, the MailStore Service Provider Edition (SPE) and MailStore Cloud were certified by an independent IT auditor and data privacy expert. The GDPR certificate relates to the processing of personal data, which complies with the requirements of the EU’s GDPR and the Federal Data Protection Act (DSG) in Switzerland, respectively.

Further information about MailStore Version 26.3 can be found in this blog post.

Information about MailStore as well as images can be downloaded here.

About MailStore

MailStore Software GmbH from Viersen near Duesseldorf, Germany, is a subsidiary of OpenText, “The Information Company” (NASDAQ: OTEX) (TSX: OTEX) and one of the world’s leading providers of email archiving solutions. Over 100,000 companies, public authorities and educational institutions in more than 100 countries have placed their trust in the products of the German specialist.
MailStore was awarded the Business Excellence Award 2023 in the category “Best Independent Email Archiving Vendor“.

Also, with its Service Provider Edition (SPE), MailStore offers a solution that is tailored to the needs of MSPs, who can provide their customers with email archiving as a managed service.

The product portfolio also includes MailStore Home, a solution that enables individual home users to archive their private emails free of charge. MailStore Home is currently used by more than 1,000,000 people worldwide.

More information