SSL handshake throwing "No common named group" exception

[hudcap]

First of all, thank you for this awesome software!

I'm running DavMail in server mode with SSL on Windows 11, using the standalone davmail version that comes with Java Everything worked fine in 6.2.1-3496 Upgraded to 6.2.2-3546, and now when Gmail fetches via POP, Java throws a "No common named group" exception It works fine when I test the connection from Python

Error log:

2024-07-03 09:59:07,566 INFO  [main] davmail  - DavMail Gateway 6.2.2-3546 listening on SMTP port 465 POP port 1110
2024-07-03 09:59:07,790 DEBUG [CheckRelease] davmail.http.HttpClientAdapter  - GET https://davmail.sourceforge.net/version.txt
2024-07-03 09:59:07,873 DEBUG [CheckRelease] davmail.http.DavGatewaySSLSocketFactory  - createSocket davmail.sourceforge.net 443
2024-07-03 09:59:08,226 DEBUG [CheckRelease] davmail.DavGateway  - DavMail released version: 6.2.2-3546
2024-07-03 09:59:30,613 DEBUG [davmail.pop.PopServer] davmail  - Connection from /*** on port 1110
2024-07-03 09:59:30,616 INFO  [davmail.pop.PopServer] davmail.connection  - CONNECT - ***
2024-07-03 09:59:30,670 DEBUG [PopConnection-***] davmail.http.DavGatewaySSLSocketFactory  - createSocket outlook.office365.com 443
2024-07-03 09:59:30,771 DEBUG [PopConnection-***] davmail.exchange.ExchangeSession  - Test configuration status: 401
2024-07-03 09:59:30,780 DEBUG [PopConnection-***] davmail  - > +OK DavMail 6.2.2-3546 POP ready at Wed Jul 03 09:59:30 EDT 2024
2024-07-03 09:59:30,789 ERROR [PopConnection-***] davmail  - No common named group
javax.net.ssl.SSLProtocolException: No common named group
        at java.base/sun.security.ssl.Alert.createSSLException(Unknown Source)
        at java.base/sun.security.ssl.Alert.createSSLException(Unknown Source)
        at java.base/sun.security.ssl.TransportContext.fatal(Unknown Source)
        at java.base/sun.security.ssl.TransportContext.fatal(Unknown Source)
        at java.base/sun.security.ssl.TransportContext.fatal(Unknown Source)
        at java.base/sun.security.ssl.KeyShareExtension$HRRKeyShareProducer.produce(Unknown Source)
        at java.base/sun.security.ssl.SSLExtension.produce(Unknown Source)
        at java.base/sun.security.ssl.SSLExtensions.produce(Unknown Source)
        at java.base/sun.security.ssl.ServerHello$T13HelloRetryRequestProducer.produce(Unknown Source)
        at java.base/sun.security.ssl.SSLHandshake.produce(Unknown Source)
        at java.base/sun.security.ssl.ClientHello$T13ClientHelloConsumer.goHelloRetryRequest(Unknown Source)
        at java.base/sun.security.ssl.ClientHello$T13ClientHelloConsumer.consume(Unknown Source)
        at java.base/sun.security.ssl.ClientHello$ClientHelloConsumer.onClientHello(Unknown Source)
        at java.base/sun.security.ssl.ClientHello$ClientHelloConsumer.consume(Unknown Source)
        at java.base/sun.security.ssl.SSLHandshake.consume(Unknown Source)
        at java.base/sun.security.ssl.HandshakeContext.dispatch(Unknown Source)
        at java.base/sun.security.ssl.HandshakeContext.dispatch(Unknown Source)
        at java.base/sun.security.ssl.TransportContext.dispatch(Unknown Source)
        at java.base/sun.security.ssl.SSLTransport.decode(Unknown Source)
        at java.base/sun.security.ssl.SSLSocketImpl.decode(Unknown Source)
        at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(Unknown Source)
        at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
        at java.base/sun.security.ssl.SSLSocketImpl.ensureNegotiated(Unknown Source)
        at java.base/sun.security.ssl.SSLSocketImpl$AppOutputStream.write(Unknown Source)
        at java.base/java.io.BufferedOutputStream.flushBuffer(Unknown Source)
        at java.base/java.io.BufferedOutputStream.flush(Unknown Source)
        at davmail.AbstractConnection.sendClient(AbstractConnection.java:186)
        at davmail.pop.PopConnection.sendOK(PopConnection.java:289)
        at davmail.pop.PopConnection.run(PopConnection.java:99)
2024-07-03 09:59:30,796 DEBUG [PopConnection-***] davmail  - > -ERR No common named group
2024-07-03 09:59:30,801 DEBUG [PopConnection-***] davmail  - Exception sending error to client Connection or outbound has closed
java.net.SocketException: Connection or outbound has closed
        at java.base/sun.security.ssl.SSLSocketImpl$AppOutputStream.write(Unknown Source)
        at java.base/java.io.BufferedOutputStream.flushBuffer(Unknown Source)
        at java.base/java.io.BufferedOutputStream.flush(Unknown Source)
        at davmail.AbstractConnection.sendClient(AbstractConnection.java:186)
        at davmail.pop.PopConnection.sendERR(PopConnection.java:301)
        at davmail.pop.PopConnection.run(PopConnection.java:278)
2024-07-03 09:59:30,802 INFO  [PopConnection-***] davmail.connection  - DISCONNECT - ***```