DavMail Setup on Mac OS X

DavMail requires a recent Java JRE, with OpenJFX support for O365Interactive authentication.

Recommended source is Azul at: Download Azul JDK. Pick your architecture, ARM for Apple Silicon and x86 64 for intel-based Macs.

An alternative is to use SDKMAN to install java, see SDKMAN Zulu sdk install java 25.0.3.fx-zulu

Next download DavMail-MacOSX-version.app.zip

This application bundle is built from source with ant. However, to avoid the apple tax, the package is not signed. On recent macOS versions you will get a security warning and a suggestion to move application to trash. Just open settings / Privacy & Security, find the message: "DavMail was blocked from use because it is not from an identified developer" and click Open Anyway

On older OSX Mountain Lion, you need to disable Gatekeeper (at least temporarily) to avoid the warning or DavMail is damaged and can’t be opened message with Java 6 package.

Download DavMail macOS package from Sourceforge:

Safari should automatically extract application from archive. If not, just double-click on the zip file to trigger decompression. DavMail.app directory is then recognized as a valid OSX application. However, as the application is not signed, you will need to bypass warning under Privacy & Security.

On OSX Mountain Lion, open System Preferences and choose Security and Privacy, then unlock panel with lock icon and choose Anywhere:

Launch DavMail application once (double-click on the application icon).

You can then go back to System Preferences/Security and Privacy and restore original setting.

On first start the application displays the Settings (Preferences) frame.

Growl is no longer supported.

Adjust DavMail settings: Getting started

Troubleshooting

If macOS is unable to find you JDK/JRE, check java version in a terminal: java -version. If you get the following message: The operation couldn’t be completed. Unable to locate a Java Runtime. you need to reference your version of java for the system wrappers: sudo ln -sfn /path/to/your/jdk /Library/Java/JavaVirtualMachines/yourjdk.jdk

If you chose the zip or tar.gz package, you may also want to set JAVA_HOME and add $JAVA_HOME/bin to your PATH.

Advanced

You can embed the JDK inside the application bundle to create a standalone application. Grab the Zulu JRE FX zip package, see above instructions, then move its content inside DavMail.app. Then edit DavMail Info.plist to adjust JAVA_HOME, an example LSEnvironment setting is already available.

                <key>LSEnvironment</key>
                <dict><key>JAVA_HOME</key><string>Contents/Frameworks/azul-jre-fx/Contents/Home</string></dict>
            

As macOS maintains an internal cache of application settings, you will have to force a full cache reload:

/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -seed