# Unable to send email so using gmail

**URL:** <https://forum.flowable.org/t/unable-to-send-email-so-using-gmail/9619>\
**Category:** Flowable Engine\
**Created:** [August 8, 2022, 7:04am UTC](https://forum.flowable.org/t/unable-to-send-email-so-using-gmail/9619 "2022-08-08T07:04:55Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![luonganhtu19](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/luonganhtu19/32/2891_2.png) [@luonganhtu19](https://forum.flowable.org/u/luonganhtu19)\
**Post date:** [August 8, 2022, 7:04am UTC](https://forum.flowable.org/t/unable-to-send-email-so-using-gmail/9619/1 "2022-08-08T07:04:55Z")

</div>

Dear all,  
I have an issue when using processEngie “mail task”. I did the following steps:

1. Project spring-boot integration flowable(6.6).
2. I use Ui-flowable to design workflow basic use MailTask.

```auto
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:flowable="http://flowable.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.flowable.org/processdef">
  <process id="mail" name="Example Email" isExecutable="true">
    <startEvent id="start" name="start" flowable:formFieldValidation="true"></startEvent>
    <serviceTask id="email" name="emai" flowable:type="mail">
      <extensionElements>
        <flowable:field name="to">
          <flowable:string><![CDATA[abc@gmail.com]]></flowable:string>
        </flowable:field>
        <flowable:field name="subject">
          <flowable:string><![CDATA[Test]]></flowable:string>
        </flowable:field>
        <flowable:field name="text">
          <flowable:string><![CDATA[test]]></flowable:string>
        </flowable:field>
      </extensionElements>
    </serviceTask>
    <endEvent id="end" name="end"></endEvent>
    <sequenceFlow id="flow1" name="flow1" sourceRef="start" targetRef="email"></sequenceFlow>
    <sequenceFlow id="flow2" name="flow2" sourceRef="email" targetRef="end"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_mail">
    <bpmndi:BPMNPlane bpmnElement="mail" id="BPMNPlane_mail">
      <bpmndi:BPMNShape bpmnElement="start" id="BPMNShape_start">
        <omgdc:Bounds height="30.0" width="30.0" x="100.0" y="163.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="email" id="BPMNShape_email">
        <omgdc:Bounds height="80.0" width="100.0" x="175.0" y="138.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="end" id="BPMNShape_end">
        <omgdc:Bounds height="28.0" width="28.0" x="320.0" y="164.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="129.9499984899576" y="178.0"></omgdi:waypoint>
        <omgdi:waypoint x="174.9999999999917" y="178.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="274.95000000000005" y="178.0"></omgdi:waypoint>
        <omgdi:waypoint x="320.0" y="178.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

```

1. Config properties:  
flowable.async-executor-activate=false  
[flowable.mail.server.host=smtp.gmail.com](http://flowable.mail.server.host=smtp.gmail.com)  
flowable.mail.server.port=587  
flowable.mail.server.default-from=  
flowable.mail.server.username=  
flowable.mail.server.password=( **using password app of gmai** l)  
flowable.mail.server.use-tls=true

I run, but I have an issue with the message error:

```auto
: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.flowable.common.engine.api.FlowableException: Could not send e-mail in execution 30011] with root cause

javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25, response: 421
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:2106) ~[javax.mail-1.5.6.jar:1.5.6]
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:712) ~[javax.mail-1.5.6.jar:1.5.6]
	at javax.mail.Service.connect(Service.java:366) ~[javax.mail-1.5.6.jar:1.5.6]
	at javax.mail.Service.connect(Service.java:246) ~[javax.mail-1.5.6.jar:1.5.6]
	at javax.mail.Service.connect(Service.java:195) ~[javax.mail-1.5.6.jar:1.5.6]
	at javax.mail.Transport.send0(Transport.java:254) ~[javax.mail-1.5.6.jar:1.5.6]
	at javax.mail.Transport.send(Transport.java:124) ~[javax.mail-1.5.6.jar:1.5.6]
	at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1459) ~[commons-email-1.5.jar:1.5]
	at org.apache.commons.mail.Email.send(Email.java:1496) ~[commons-email-1.5.jar:1.5]
	at org.flowable.engine.impl.bpmn.behavior.MailActivityBehavior.execute(MailActivityBehavior.java:119) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.agenda.ContinueProcessOperation.executeActivityBehavior(ContinueProcessOperation.java:313) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.agenda.ContinueProcessOperation.executeSynchronous(ContinueProcessOperation.java:170) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.agenda.ContinueProcessOperation.continueThroughFlowNode(ContinueProcessOperation.java:125) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.agenda.ContinueProcessOperation.run(ContinueProcessOperation.java:88) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.common.engine.impl.AbstractEngineConfiguration.lambda$new$0(AbstractEngineConfiguration.java:173) ~[flowable-engine-common-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperation(CommandInvoker.java:97) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperations(CommandInvoker.java:81) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:64) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.interceptor.BpmnOverrideContextInterceptor.execute(BpmnOverrideContextInterceptor.java:26) ~[flowable-engine-6.6.0.jar:6.6.0]
	at org.flowable.common.engine.impl.interceptor.TransactionContextInterceptor.execute(TransactionContextInterceptor.java:53) ~[flowable-engine-common-6.6.0.jar:6.6.0]
	at org.flowable.common.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:83) ~[flowable-engine-common-6.6.0.jar:6.6.0]
	at org.flowable.common.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:30) ~[flowable-engine-common-6.6.0.jar:6.6.0]
	at org.flowable.common.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:56) ~[flowable-engine-common-6.6.0.jar:6.6.0]
	at org.flowable.common.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:51) ~[flowable-engine-common-6.6.0.jar:6.6.0]
	at org.flowable.engine.impl.RuntimeServiceImpl.startProcessInstanceById(RuntimeServiceImpl.java:161) ~[flowable-engine-6.6.0.jar:6.6.0]
	at com.workflowengine.service.WorkflowService.submit(WorkflowService.java:94) ~[classes/:na]
	at com.workflowengine.controller.WorkflowController.submit(WorkflowController.java:47) ~[classes/:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) ~[tomcat-embed-core-9.0.63.jar:4.0.FR]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.63.jar:4.0.FR]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.20.jar:5.3.20]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.20.jar:5.3.20]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96) ~[spring-boot-actuator-2.7.0.jar:2.7.0]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.20.jar:5.3.20]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.20.jar:5.3.20]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.63.jar:9.0.63]
	at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]

```

Please, Could you help me figure out where the error is??  
Thank you very much!!!

---

<div class="post-metadata">

**Author:** ![amporsim](https://avatars.discourse-cdn.com/v4/letter/a/ea666f/32.png) [@amporsim](https://forum.flowable.org/u/amporsim)\
**Post date:** [August 8, 2022, 2:32pm UTC](https://forum.flowable.org/t/unable-to-send-email-so-using-gmail/9619/2 "2022-08-08T14:32:30Z")

</div>

Hi @luonganhtu19

Have a look here: [Flowable Email Activity - #9 by santosh](https://forum.flowable.org/t/flowable-email-activity/4782/9)

It might help you.

Regards,  
Simon

---

<div class="post-metadata">

**Author:** ![luonganhtu19](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/luonganhtu19/32/2891_2.png) [@luonganhtu19](https://forum.flowable.org/u/luonganhtu19)\
**Post date:** [August 9, 2022, 7:27am UTC](https://forum.flowable.org/t/unable-to-send-email-so-using-gmail/9619/3 "2022-08-09T07:27:11Z")

</div>

Hi @amporsim ,  
Thanks, for your help.  
But it seems the error is not the same. I used Gmail’s app password but it still gives me an error.

---

<div class="post-metadata">

**Author:** ![gdharley](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/gdharley/32/2695_2.png) [@gdharley](https://forum.flowable.org/u/gdharley)\
**Post date:** [August 9, 2022, 1:56pm UTC](https://forum.flowable.org/t/unable-to-send-email-so-using-gmail/9619/4 "2022-08-09T13:56:24Z")

</div>

The following log entry suggests your configuration file is not being picked up:  
Could not connect to SMTP host: localhost, port: 25, response: 421

---

<div class="post-metadata">

**Author:** ![luonganhtu19](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/luonganhtu19/32/2891_2.png) [@luonganhtu19](https://forum.flowable.org/u/luonganhtu19)\
**Post date:** [August 9, 2022, 11:08pm UTC](https://forum.flowable.org/t/unable-to-send-email-so-using-gmail/9619/5 "2022-08-09T23:08:27Z")

</div>

I got it.  
Thank you so much.