为什么我不能发送电子邮件？

Question

我面临无法发送电子邮件的事实。我不明白原因。我使用 Spting Boot 2。该示例使用 JavaMailSender 类。但是你可以不用它的实现和在 application.properties 中指定的必要参数吗？

@Configuration

public class MainConfiguration {

    @Bean

    public JavaMailSender getJavaMailSender() {

        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();

        mailSender.setHost("smtp.yandex.ru");

        mailSender.setPort(465);

        mailSender.setUsername("[e-mail]");

        mailSender.setPassword("test122223");

        Properties props = mailSender.getJavaMailProperties();

        props.put("mail.transport.protocol", "smtp");

        props.put("mail.smtp.auth", "true");

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

        props.put("mail.debug", "true");

        props.put("mail.smtp.socketFactory.port", "465");

        props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");

        //props.put("mail.smtp.timeout", 1000);

        return mailSender;

    }

    @Bean

    public SimpleMailMessage templateSimpleMessage() {

        SimpleMailMessage message = new SimpleMailMessage();

        message.setText("This is the test email template for your email:");

        return message;

    }

}

2 分钟后，出现错误："javax.mail.MessagingException: Could not connect to SMTP host"

Answer 1

尝试添加spring.mail.properties.mail.smtp.ssl.enable=true或者props.put("mail.smtp.ssl.enable", "true");我不明白你为什么要使用配置类，如果你使用的是 spring boot 2，你可以将所有电子邮件配置放在你的 application.properties 文件中：spring.mail.properties.mail.smtp.auth=truespring.mail.properties.mail.smtp.starttls.enable=truespring.mail.properties.mail.smtp.ssl.enable=truespring.mail.host=smtp.yandex.ruspring.mail.port=465spring.mail.username=[e-mail]=test122223

Answer 2

试试这个代码：Intent i = new Intent(Intent.ACTION_SEND);   i.setType("message/rfc822");   i.putExtra(Intent.EXTRA_EMAIL  , new String[]{"[e-mail]"});   i.putExtra(Intent.EXTRA_SUBJECT, "subject of email");   i.putExtra(Intent.EXTRA_TEXT   , "body of email");try{     startActivity(Intent.createChooser(i, "Send mail..."));   }catch (android.content.ActivityNotFoundException ex) {     Toast.makeText(MyActivity.this, "There are no email clients installed.",      Toast.LENGTH_SHORT).show();   }