Spring boot read and new mail Listener on spring-boot-starter-mail

Question

I want to demonstrate the email application using the spring boot MVC in that web application I follow this tutorial I can easily send the emails using spring boot.

Here my question is

1. how can I read the emails using spring boot..?
2. how can I listen for new emails and how to update the inbox on the view..?

please suggest me any solutions for that because I searched a lot but I can find only send email example.please share me if you have any working samples for that using spring boot. Thanks in advance.

Answer 1

You could consider using Spring integration mail support

There is a Java DSL for this purposes.
An example of IMAP config could be found here

The key aspects are like this

@Configuration
@EnableIntegration
public class IntegrationConfig {
    ...

    @Bean
    public IntegrationFlow imapIdleFlow() {
        return IntegrationFlows
                .from(Mail.imapIdleAdapter("imap://user:pw@localhost:" + imapIdleServer.getPort() + "/INBOX")
                        .autoStartup(true)
                        .searchTermStrategy(this::fromAndNotSeenTerm)
                        .userFlag("testSIUserFlag")
                        .javaMailProperties(p -> p.put("mail.debug", "false")
                                .put("mail.imap.connectionpoolsize", "5"))
                        .shouldReconnectAutomatically(false)
                        .headerMapper(mailHeaderMapper()))
                .channel(MessageChannels.queue("imapIdleChannel"))
                .get();
    }

    @Bean
    public HeaderMapper<MimeMessage> mailHeaderMapper() {
        return new DefaultMailHeaderMapper();
    }

    private SearchTerm fromAndNotSeenTerm(Flags supportedFlags, Folder folder) {
        try {
            FromTerm fromTerm = new FromTerm(new InternetAddress("bar@baz"));
            return new AndTerm(fromTerm, new FlagTerm(new Flags(Flags.Flag.SEEN), false));
        }
        catch (AddressException e) {
            throw new RuntimeException(e);
        }

    }
}