DavMail, an open-source, cross-platform Exchange and Office 365 gateway that allows users to integrate their preferred email and calendar clients—such as Thunderbird—with Microsoft Exchange servers, has just reached version 6.3.
One of the significant advancements in the new release is the upgraded embedded Java Runtime Environment to version 21, which directly improves TLS 1.3 support, a protocol offering tighter security for all communications between DavMail and Exchange or Office 365.
The DavMail team has also implemented a more secure channel binding mechanism for NTLM authentication, reinforcing the gateway’s security capabilities.
Another noteworthy change for sysadmins and developers is releasing a more recent Docker file in the project’s “contribs” folder. Linux users will be pleased with the newly reviewed RPM build, which provides compatibility with EL9 and ensures smoother installations.
Several minor fixes, tailored to Fedora and Kubuntu, further refine DavMail’s cross-platform compatibility.
DavMail 6.3 also incorporates a patch that fixes issues related to backslashes in password strings. At the same time, Office 365 compatibility has been bolstered with enhanced support for non-standard tenants and GCC High endpoints, offering organizations greater flexibility.
The new release’s work-in-progress Microsoft Graph backend implementation may be the most intriguing novelty for power users and developers. While incomplete, DavMail is gearing up to integrate the Microsoft Graph API for folder searching, token management, and property retrieval tasks.
Last but not least, DavMail 6.3 introduces better handling of multiple categories of to-do items, aligning Exchange calendar functionalities more closely with standard CalDav setups. On the LDAP side, contributors have streamlined the certificate selection logic, making it possible to retrieve user certificates directly.
For more information, see the announcement.
