...
<property name="mailServerHost" value="smtp.gmail.com"/>
<property name="mailServerPort" value="587"/>
<property name="mailServerDefaultFrom" value="mailtasktest1@gmailmailtask@gmail.com"/>
<property name="mailServerUseTLS" value="true"/>
<property name="mailServerUsername" value="mailtasktest1@gmailmailtask@gmail.com"/>
<property name="mailServerPassword" value="mailtask123"/>
...
<property name="mailServerUsername" value="mailtasktest1@gmailmailtask@gmail.com"/>
<property name="mailServerPassword" value="mailtask123"/>
Here you should include the email address and the password you specified in the “from” field of the mail task.
...