Here is the code and the stacktrace just in case, maybe there is a better way to send email:

private void send(UserModel user, AuthenticationFlowContext context, String subject, String textBody, String htmlBody) throws EmailException {
        try {
            String address = user.getEmail();
            Map<String, String> config = context.getRealm().getSmtpConfig();

            Properties props = new Properties();
            props.setProperty("mail.smtp.host", config.get("host"));

            boolean auth = "true".equals(config.get("auth"));
            boolean ssl = "true".equals(config.get("ssl"));
            boolean starttls = "true".equals(config.get("starttls"));

            if (config.containsKey("port")) {
                props.setProperty("mail.smtp.port", config.get("port"));
            }

            if (auth) {
                props.put("mail.smtp.auth", "true");
            }

            if (ssl) {
                props.put("mail.smtp.socketFactory.port", config.get("port"));
                props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
            }

            if (starttls) {
                props.put("mail.smtp.starttls.enable", "true");
            }

            String from = config.get("from");

            Session session = Session.getInstance(props);

            Multipart multipart = new MimeMultipart("alternative");

            if (textBody != null) {
                MimeBodyPart textPart = new MimeBodyPart();
                textPart.setText(textBody, "UTF-8");
                multipart.addBodyPart(textPart);
            }

            if (htmlBody != null) {
                MimeBodyPart htmlPart = new MimeBodyPart();
                htmlPart.setContent(htmlBody, "text/html; charset=UTF-8");
                multipart.addBodyPart(htmlPart);
            }

            Message msg = new MimeMessage(session);
            msg.setFrom(new InternetAddress(from));
            msg.setHeader("To", address);
            msg.setSubject(subject);
            msg.setContent(multipart);
            msg.saveChanges();
            msg.setSentDate(new Date());

            Transport transport = session.getTransport("smtp");
            if (auth) {
                transport.connect(config.get("user"), config.get("password"));
            } else {
                transport.connect();
            }
            transport.sendMessage(msg, new InternetAddress[]{new InternetAddress(address)});
        } catch (Exception e) {
            throw new EmailException(e);
        }
    }

connect/auth

JBWEB000309: type JBWEB000066: Exception report

JBWEB000068: message request path: /auth/realms/MYAPP/protocol/openid-connect/auth

JBWEB000069: description JBWEB000145: The server encountered an internal error that prevented it from fulfilling this request.

JBWEB000070: exception

java.lang.RuntimeException: request path: /auth/realms/MYAPP/protocol/openid-connect/auth
    org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:75)
JBWEB000071: root cause

org.jboss.resteasy.spi.UnhandledException: java.lang.NoClassDefFoundError: javax/mail/Multipart
    org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:364)
    org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:232)
    org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:208)
    org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:556)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:523)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:125)
    org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:61)
JBWEB000071: root cause

java.lang.NoClassDefFoundError: javax/mail/Multipart
    de.MYAPP.auth.authenticator.MYAPPEmailAuthenticatorFactory.create(MYAPPEmailAuthenticatorFactory.java:27)
    de.MYAPP.auth.authenticator.MYAPPEmailAuthenticatorFactory.create(MYAPPEmailAuthenticatorFactory.java:19)
    org.keycloak.authentication.DefaultAuthenticationFlow.processFlow(DefaultAuthenticationFlow.java:124)
    org.keycloak.authentication.DefaultAuthenticationFlow.processFlow(DefaultAuthenticationFlow.java:97)
    org.keycloak.authentication.AuthenticationProcessor.authenticate(AuthenticationProcessor.java:650)
    org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.browserAuthentication(AuthorizationEndpoint.java:315)
    org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.buildAuthorizationCodeAuthorizationResponse(AuthorizationEndpoint.java:265)
    org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.build(AuthorizationEndpoint.java:123)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:606)
    org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:168)
    org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:269)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:227)
    org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:158)
    org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:106)
    org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:153)
    org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:91)
    org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:541)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:523)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:125)
    org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:61)
JBWEB000071: root cause

java.lang.ClassNotFoundException: javax.mail.Multipart
    java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    java.security.AccessController.doPrivileged(Native Method)
    java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    de.MYAPP.auth.authenticator.MYAPPEmailAuthenticatorFactory.create(MYAPPEmailAuthenticatorFactory.java:27)
    de.MYAPP.auth.authenticator.MYAPPEmailAuthenticatorFactory.create(MYAPPEmailAuthenticatorFactory.java:19)
    org.keycloak.authentication.DefaultAuthenticationFlow.processFlow(DefaultAuthenticationFlow.java:124)
    org.keycloak.authentication.DefaultAuthenticationFlow.processFlow(DefaultAuthenticationFlow.java:97)
    org.keycloak.authentication.AuthenticationProcessor.authenticate(AuthenticationProcessor.java:650)
    org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.browserAuthentication(AuthorizationEndpoint.java:315)
    org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.buildAuthorizationCodeAuthorizationResponse(AuthorizationEndpoint.java:265)
    org.keycloak.protocol.oidc.endpoints.AuthorizationEndpoint.build(AuthorizationEndpoint.java:123)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:606)
    org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:168)
    org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:269)
    org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:227)
    org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:158)
    org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:106)
    org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:153)
    org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:91)
    org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:541)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:523)
    org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:125)
    org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
    org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:61)

Am 23.11.15 um 13:32 schrieb Ataraxus:
Hey,

I'm writing my custum login provider which works great so far, but i 
stumbled upon a dependency issue:
I wan't to use mail in my authenticator, but when the authenticator gets 
actually loaded I get an class not found exception.
Somehow is java.mail.* not available in the classpath of providers which 
are dropped in the configuration/providers path.
How can i use these dependencies? I could include them into my jar, but 
i guess thats not the "right" way.

Thanks
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