How to send mail using Spring Batch - spring

Question

I want to send mail after processor. These is my step configuration:
public Step remindByMail() {
return stepBuilderFactory
.get("remindByMail")
.<Customer, SimpleMailMessage> chunk(1)
.reader(getCustomerList())
.processor(new MailProcessor())
.writer(new SendMail())
.build();
}
public class MailProcessor implements ItemProcessor<Customer, SimpleMailMessage> {
private String from = "aaa#oku.com";
#Override
public SimpleMailMessage process(Customer customer) throws Exception {
SimpleMailMessage message = new SimpleMailMessage();
message.setFrom(from);
message.setTo("duyetpt#oku.com");
message.setSubject("Welcome " + customer.getUsername());
message.setText(customer.getInfo());
return message;
}
}
public class SendMail implements ItemWriter<SimpleMailMessage> {
#Override
public void write(List<? extends SimpleMailMessage> messages) throws Exception {
messages.stream().forEach((message)->mailSender.send(message));
}
}
And I have set these properties in application.properties file,
spring.mail.default-encoding=UTF-8
spring.mail.protocol=smtp
spring.mail.host=195.179.79.52
spring.mail.port=25
spring.mail.username=admin
spring.mail.password=admin
spring.mail.properties.mail.smtp.auth=true
My pom.xml:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-task</artifactId>
<version>2.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.batch</groupId>
<artifactId>spring-batch-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.oracle.ojdbc</groupId>
<artifactId>ojdbc8</artifactId>
<version>19.3.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
However, I got the error:
org.springframework.mail.MailAuthenticationException: Authentication failed; nested exception is javax.mail.AuthenticationFailedException: No authentication mechanisms supported by both server and client
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:440)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:323)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:312)
.....
Caused by: javax.mail.AuthenticationFailedException: No authentication mechanisms supported by both server and client
at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:880)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:780)
.....
What should I do to send mail using Spring Batch?

Answer 1

Its my guess by your error message - No authentication mechanisms supported by both server and client that below properties needs to be removed from your configuration.
spring.mail.username=admin
spring.mail.password=admin
spring.mail.properties.mail.smtp.auth=true
In Spring Boot + Batch , I send emails using my organization's server without these properties as user name & passwords are not needed because program has to reside in organization network & that is the only security.
Its altogether a different story if one is trying to use - gmail , yahoo etc.