Access Denied Error When Sending Mail From Java

Sending Email from Java Class is very simple.Here is a simple java program to send emails .

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

/**
 * Created by abhishek.somani on 30/11/16.
 */
public class MailSender {

    public static void main(String[] args) throws MessagingException {
        new MailSender().sendMail();
    }

    public void sendMail() throws MessagingException {
        System.setProperty("mail.smtp.localhost","localhost");
        Properties props = new Properties();
        props.put("mail.smtp.localhost","javaroots.com");
        props.put("mail.smtp.host","javaroots.host");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port", 587);
        
        Session session = Session.getInstance(props,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication("test@test", "abcd");
                    }
                });
        session.setDebug(true);

        InternetAddress[] toAddress = new InternetAddress[1];
        toAddress = InternetAddress.parse("gmail@rajnikant.com",false);

        Transport t = session.getTransport("smtp");
        t.connect("host",
                587,"abcd","abcd");
        MimeMessage message = new MimeMessage(session);

        message.setFrom(new InternetAddress("gmail@amitabh.com"));
        message.setRecipients(Message.RecipientType.TO,
                toAddress);
        message.setSubject("Testing Subject");

        String body = "DSADSADAASDD";
        message.setText(body,"utf-8");
        t.send(message,message.getAllRecipients());
    }

}

Now this program gives you following error , even transport.isConnected() returns true . So it means that password and username and other details are correct , and it is able to make a connection to smtp server , but still it is not able to send mail .

javax.mail.SendFailedException: Invalid Addresses;
  nested exception is:
 com.sun.mail.smtp.SMTPAddressFailedException: 554 5.7.1 : Client host rejected: Access denied

 at com.sun.mail.smtp.SMTPTransport.rcptTo(SMTPTransport.java:1607)
 at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:887)
 at javax.mail.Transport.send0(Transport.java:191)
 at javax.mail.Transport.send(Transport.java:120)
 at com.services.RestServices.cancelManagerPicking(RestServices.java:2348)
 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:497)
 at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:187)
 at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:71)
 at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:280)
 at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
 at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
 at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
 at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
 at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1341)
 at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1273)
 at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1223)
 at org.mule.module.jersey.JerseyResourcesComponent.doInvoke(JerseyResourcesComponent.java:159)
 at org.mule.component.AbstractComponent.invokeInternal(AbstractComponent.java:122)
 at org.mule.component.AbstractComponent.access$000(AbstractComponent.java:57)
 at org.mule.component.AbstractComponent$1$1.process(AbstractComponent.java:238)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.AbstractInterceptingMessageProcessorBase.processNext(AbstractInterceptingMessageProcessorBase.java:102)
 at org.mule.interceptor.AbstractEnvelopeInterceptor.process(AbstractEnvelopeInterceptor.java:51)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:94)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.doProcess(InterceptingChainLifecycleWrapper.java:50)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.access$001(InterceptingChainLifecycleWrapper.java:22)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper$1.process(InterceptingChainLifecycleWrapper.java:66)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.process(InterceptingChainLifecycleWrapper.java:61)
 at org.mule.component.AbstractComponent.process(AbstractComponent.java:156)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:94)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.AbstractInterceptingMessageProcessorBase.processNext(AbstractInterceptingMessageProcessorBase.java:102)
 at org.mule.processor.AsyncInterceptingMessageProcessor.process(AsyncInterceptingMessageProcessor.java:97)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.AbstractInterceptingMessageProcessorBase.processNext(AbstractInterceptingMessageProcessorBase.java:102)
 at org.mule.construct.DynamicPipelineMessageProcessor.process(DynamicPipelineMessageProcessor.java:54)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:94)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.AbstractInterceptingMessageProcessorBase.processNext(AbstractInterceptingMessageProcessorBase.java:102)
 at org.mule.interceptor.AbstractEnvelopeInterceptor.process(AbstractEnvelopeInterceptor.java:51)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.AbstractInterceptingMessageProcessorBase.processNext(AbstractInterceptingMessageProcessorBase.java:102)
 at org.mule.processor.AbstractFilteringMessageProcessor.process(AbstractFilteringMessageProcessor.java:40)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.AbstractInterceptingMessageProcessorBase.processNext(AbstractInterceptingMessageProcessorBase.java:102)
 at org.mule.construct.AbstractPipeline$1.process(AbstractPipeline.java:109)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.DefaultMessageProcessorChain.doProcess(DefaultMessageProcessorChain.java:94)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.doProcess(InterceptingChainLifecycleWrapper.java:50)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.access$001(InterceptingChainLifecycleWrapper.java:22)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper$1.process(InterceptingChainLifecycleWrapper.java:66)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.process(InterceptingChainLifecycleWrapper.java:61)
 at org.mule.construct.AbstractPipeline$3.process(AbstractPipeline.java:207)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.SimpleMessageProcessorChain.doProcess(SimpleMessageProcessorChain.java:43)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.doProcess(InterceptingChainLifecycleWrapper.java:50)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.access$001(InterceptingChainLifecycleWrapper.java:22)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper$1.process(InterceptingChainLifecycleWrapper.java:66)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.process(InterceptingChainLifecycleWrapper.java:61)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.SimpleMessageProcessorChain.doProcess(SimpleMessageProcessorChain.java:43)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.doProcess(InterceptingChainLifecycleWrapper.java:50)
 at org.mule.processor.chain.AbstractMessageProcessorChain.process(AbstractMessageProcessorChain.java:67)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.access$001(InterceptingChainLifecycleWrapper.java:22)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper$1.process(InterceptingChainLifecycleWrapper.java:66)
 at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
 at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)
 at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:44)
 at org.mule.processor.chain.InterceptingChainLifecycleWrapper.process(InterceptingChainLifecycleWrapper.java:61)
 at org.mule.transport.AbstractMessageReceiver.routeEvent(AbstractMessageReceiver.java:511)
 at org.mule.transport.AbstractMessageReceiver.routeMessage(AbstractMessageReceiver.java:226)
 at org.mule.transport.AbstractMessageReceiver.routeMessage(AbstractMessageReceiver.java:208)
 at org.mule.transport.AbstractMessageReceiver.routeMessage(AbstractMessageReceiver.java:200)
 at org.mule.transport.AbstractMessageReceiver.routeMessage(AbstractMessageReceiver.java:187)
 at org.mule.transport.http.HttpMessageReceiver$HttpWorker$1.process(HttpMessageReceiver.java:311)
 at org.mule.transport.http.HttpMessageReceiver$HttpWorker$1.process(HttpMessageReceiver.java:306)
 at org.mule.execution.ExecuteCallbackInterceptor.execute(ExecuteCallbackInterceptor.java:16)
 at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:30)
 at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:14)
 at org.mule.execution.BeginAndResolveTransactionInterceptor.execute(BeginAndResolveTransactionInterceptor.java:54)
 at org.mule.execution.ResolvePreviousTransactionInterceptor.execute(ResolvePreviousTransactionInterceptor.java:44)
 at org.mule.execution.SuspendXaTransactionInterceptor.execute(SuspendXaTransactionInterceptor.java:50)
 at org.mule.execution.ValidateTransactionalStateInterceptor.execute(ValidateTransactionalStateInterceptor.java:40)
 at org.mule.execution.IsolateCurrentTransactionInterceptor.execute(IsolateCurrentTransactionInterceptor.java:41)
 at org.mule.execution.ExternalTransactionInterceptor.execute(ExternalTransactionInterceptor.java:48)
 at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:28)
 at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:13)
 at org.mule.execution.TransactionalErrorHandlingExecutionTemplate.execute(TransactionalErrorHandlingExecutionTemplate.java:109)
 at org.mule.execution.TransactionalErrorHandlingExecutionTemplate.execute(TransactionalErrorHandlingExecutionTemplate.java:30)
 at org.mule.transport.http.HttpMessageReceiver$HttpWorker.doRequest(HttpMessageReceiver.java:305)
 at org.mule.transport.http.HttpMessageReceiver$HttpWorker.processRequest(HttpMessageReceiver.java:251)
 at org.mule.transport.http.HttpMessageReceiver$HttpWorker.run(HttpMessageReceiver.java:163)
 at org.mule.transport.TrackingWorkManager$TrackeableWork.run(TrackingWorkManager.java:267)
 at org.mule.work.WorkerContext.run(WorkerContext.java:286)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
 at java.lang.Thread.run(Thread.java:745)
Caused by: com.sun.mail.smtp.SMTPAddressFailedException: 554 5.7.1 : Client host rejected: Access denied

The reason for this error was that you did not starttls in your program .Adding the following line fix the error .

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