springboot群发邮件问题实例

　　先看怎么在spring boot发邮件，我们通过一个service来实现：

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;@Slf4j
@Service
public class MailService {@AutowiredJavaMailSender javaMailSender;@Value("${mail.from}")private String mailFrom;@Value("${mail.to}")private String mailTo;@Asyncpublic void sendSimpleMail(String subject, String content) {SimpleMailMessage message = new SimpleMailMessage();message.setFrom(mailFrom);message.setTo(mailTo);message.setSubject(subject);message.setText(content);try {javaMailSender.send(message);log.info("邮件已经发送");} catch (Exception e) {log.error("发送邮件异常", e);}}}

　　我们在application.properties文件中配置邮件参数，给mait.to配置多个邮箱，并用分号分隔

#邮件
spring.mail.host=smtp.163.com
spring.mail.username=tangseng2019@163.com
spring.mail.password=wlf123
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.starttls.required=true
spring.mail.properties.mail.starttls.enable=true
spring.mail.default-encoding=UTF-8
mail.from=${spring.mail.username}
mail.to=sunwukong2019@126.com;zhubajie2019@126.com

　　注意spring.mail.password不是邮箱密码，而是授权码，需要在邮箱的“设置”中启用授权码：

　　调用上面的发送接口sendSimpleMail

　　问题来了：

2020-01-02 16:29:00.549 |-ERROR [http-nio-9988-exec-6] com.wlf.order.prize.service.MailService [34] -| 发送邮件异常
org.springframework.mail.MailParseException: Could not parse mail; nested exception is javax.mail.internet.AddressException: Illegal semicolon, not in group in string ``sunwukong2019@126.com;zhubajie2019@126.com'' at position 17at org.springframework.mail.javamail.MimeMailMessage.setTo(MimeMailMessage.java:111)at org.springframework.mail.SimpleMailMessage.copyTo(SimpleMailMessage.java:204)at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:319)at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:311)at com.wlf.order.prize.service.MailService.sendSimpleMail(MailService.java:31)at com.wlf.order.prize.aop.RequestInterceptor.postHandle(RequestInterceptor.java:117)at org.springframework.web.servlet.HandlerExecutionChain.applyPostHandle(HandlerExecutionChain.java:156)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1046)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:118)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587)at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:745)
Caused by: javax.mail.internet.AddressException: Illegal semicolon, not in groupat javax.mail.internet.InternetAddress.parse(InternetAddress.java:1045)at javax.mail.internet.InternetAddress.parse(InternetAddress.java:752)at javax.mail.internet.InternetAddress.parse(InternetAddress.java:729)at org.springframework.mail.javamail.MimeMessageHelper.parseAddress(MimeMessageHelper.java:710)at org.springframework.mail.javamail.MimeMessageHelper.setTo(MimeMessageHelper.java:596)at org.springframework.mail.javamail.MimeMailMessage.setTo(MimeMailMessage.java:108)... 50 common frames omitted
2020-01-02 16:29:00.550 |-DEBUG [http-nio-9988-exec-6] org.springframework.orm.jpa.support.OpenEntityManagerInViewInterceptor [111] -| Closing JPA EntityManager in OpenEntityManagerInViewInterceptor

　　我们跟进MimeMailMessage类，发现最终死在了InternetAddress手上

　　非法分号，也就是群发我们不应该调setTo(String to)，而应该是setTo(String... to)，我们需要自己把分号拆分一下，统一起来就是：

　自此开始批发邮件了，但问题又来了，邮件服务器开始把你的邮件当垃圾邮件来处理了。详情件spring发邮件被识别为垃圾邮件：org.springframework.mail.MailSendException: Failed messages: com.sun.mail.smtp.SMTPSendFailedException: 554 DT:SPM 163。

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