MailStore 25.3 Version Released

New Features in MailStore Version 25.3

With MailStore 25.3, you can expect the indexing of e-invoice formats and a new SMTP connection type for Microsoft 365.

E-Invoice Formats in MailStore Indexes

E-mails containing e-invoices have always been archivable with MailStore. Digital invoice formats such as ZUGFeRD or XRechnung are now fully indexed in MailStore V25.3, making it easier to find e-invoices in the archive using the search function. For more information about the role of e-mail archiving regarding e-invoices, you can find it in our blog article.

New SMTP Connection Type with OAuth2 for Microsoft 365

Microsoft 365 users can look forward to a new SMTP connection type in MailStore V25.3. This new SMTP connection type supports OAuth2 authentication for sending e-mails via Microsoft 365. The previous "Standard" setting will no longer be supported from September 2025.

More Improvements for Security and Availability

To continue providing the highest level of security, some third-party components have been updated in MailStore version 25.3.

Additionally, the validity period of new certificates for Microsoft 365 Entra ID integration has been extended to 10 years, and some errors have been resolved.

In MailStore V25.3, Windows Live Mail e-mail client is no longer supported, and other unnecessary components have been removed.

All other changes and news will be published in our version notes.

Updated Certification: Meeting Data Privacy Requirements

As usual, the latest version of our software, MailStore Server and MailStore SPE Version 25.3, has been approved by an independent data privacy expert.

The certificate takes into account all relevant aspects of the European General Data Protection Regulation (GDPR) and confirms that both MailStore Server and MailStore SPE meet all requirements for processing personal data as specified in the GDPR when used appropriately.

Source: MailStore 25.2 version is now available!