Java·spring boot-JavaMailSender错误

Question

我是一个相当新的Java spring-我得到以下错误时，试图发送一个测试电子邮件。

发送电子邮件时出错：

org.springframework.Mail.mailsendexception：邮件服务器连接失败；嵌套异常为javax.mail.MessagingException：无法连接到SMTP主机:SMTP.gmail.com，端口：587；嵌套异常是：javax.net.SSL.sslexception：无法识别的SSL消息，明文连接？。失败消息：javax.mail.MessagingException：无法连接到SMTP主机:SMTP.gmail.com，端口：587；嵌套异常为：javax.net.SSL.sslexception：无法识别的SSL消息，明文连接？；消息异常（1）是：失败消息1:javax.mail.MessagingException：无法连接到SMTP主机:SMTP.gmail.com，端口：587；嵌套异常为：javax.net.SSL.sslexception：无法识别的SSL消息，明文连接？“

SimePleMailController.java

package controller;

import javax.mail.internet.MimeMessage;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class SimpleEmailController {

    @Autowired
    private JavaMailSender sender;

    @RequestMapping("/simpleemail")
    @ResponseBody
    String home() {
        try {
            sendEmail();
            return "Email Sent!";
        }catch(Exception ex) {
            return "Error in sending email: "+ex;
        }
    }

    private void sendEmail() throws Exception{
        MimeMessage message = sender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message);

        helper.setTo("[e-mail]");
        helper.setText("How are you?");
        helper.setSubject("Hi");

        sender.send(message);
    }
}

application.properties设置如下所示-对测试帐户进行测试

spring.mail.port=587
spring.mail.host=smtp.gmail.com
spring.mail.username=[e-mail]
spring.mail.password=zzzzzzzzzzz
spring.mail.protocol=smtp
spring.mail.defaultEncoding=UTF-8

spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.auth = true
spring.mail.properties.mail.smtp.socketFactory.port = 25
spring.mail.properties.mail.smtp.socketFactory.class = javax.net.ssl.SSLSocketFactory
spring.mail.properties.mail.smtp.socketFactory.fallback = true
spring.mail.properties.mail.smtp.ssl.enable=true

support.mail.address=[e-mail]

Answer 1

尝试使用@as setTo()参数进行第一次快速测试。然后，你可以让缺省配置，你不需要太多它。

spring.mail.host=smtp.gmail.com
spring.mail.username=[e-mail]
spring.mail.password=****** #hope it wasn't your real password :)
spring.mail.properties.mail.smtp.auth = true

Answer 2

从应用程序中删除此行。属性:spring.mail.properties.mail.smtp.ssl.enable=true

因为您正在使用端口587,该端口用于使用TLS发送消息。如果使用端口465（SMTP SSL端口），则应使用上述配置。