Jakarta Mail 1.6.6 is a Service Release containing the following bug fixes:
E  403    Android SocketChannel workaround not working around
E  464    use EPL v2 licensed dependencies
E  456    MimeMessage.setFrom(null) fails instead of removing the header
E  461    OAuth2 POP3 Support for Microsoft
E  473    Several modules are not included in build when JDK11 is used
E  489    mime handling crashes on Android 11 debug build
E  493    javamail.providers file missing from provider jars after 1.6.5
E  505    WriteTimeoutSocket::getFileDescriptor$ support for Conscrypt
E  512    Improve code coverage in logging-mailhandler tests