[keycloak-user] ERROR sending email with my companies SMTP server : Exception writing multipart

[abhishek raghav]

Hi

I am facing a weird issue when i try sending emails from keycloak. I try
digging the issue and figured out that when keycloak tries to template the
email content in HTML formatat.
I dont want to use the plain text body content in the email to go, so i
removed the text folder itself from the email theme.

When i tried with google SMTP, everything works perfectly fine (even HTML
content processes and can be sent).

*It says exception writing multi part.*

Can somebody help me, where is the problem.? Is it my companies SMTP not
allowing it or should i prepare the content in a different manner. ?

Below is the stack trace.
[0m [31m06:29:44,321 ERROR [org.keycloak.services] (default task-110)
KC-SERVICES0029: Failed to send email: javax.mail.MessagingException:
IOException while sending message; nested exception is:
java.io.IOException: Exception writing Multipart at
com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1290) at
org.keycloak.email.DefaultEmailSenderProvider.send(DefaultEmailSenderProvider.java:125)
at
org.keycloak.email.freemarker.FreeMarkerEmailTemplateProvider.send(FreeMarkerEmailTemplateProvider.java:191)
at
org.keycloak.email.freemarker.FreeMarkerEmailTemplateProvider.send(FreeMarkerEmailTemplateProvider.java:183)
at
org.keycloak.email.freemarker.FreeMarkerEmailTemplateProvider.send(FreeMarkerEmailTemplateProvider.java:156)
at
org.keycloak.email.freemarker.FreeMarkerEmailTemplateProvider.sendExecuteActions(FreeMarkerEmailTemplateProvider.java:139)
at
org.keycloak.services.resources.admin.UsersResource.executeActionsEmail(UsersResource.java:855)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498) at
org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139)
at
org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
at
org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
at
org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:138)
at
org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:107)
at
org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:133)
at
org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:107)
at
org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:133)
at
org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:101)
at
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:395)
at
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:202)
at
org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
at
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at
io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
at
io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
at
org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:90)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
at
io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
at
io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
at
io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at
io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at
org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at
io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at
io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at
io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at
io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at
io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
at
io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
at
io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at
io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
at
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at
org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at
io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at
io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
at
io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
at
io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
at
io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202) at
io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745) Caused by: java.io.IOException:
Exception writing Multipart at
com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:83) at
javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:897) at
javax.activation.DataHandler.writeTo(DataHandler.java:330) at
javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1645) at
javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1850) at
com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1241) ... 57
more Caused by: javax.mail.MessagingException: Empty multipart:
multipart/alternative; boundary="----=_Part_0_766978197.1478845783718" at
javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:548) at
com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:81) ...
62 more


Cheers
Abhishek