{"id":51520,"date":"2025-08-10T23:44:29","date_gmt":"2025-08-10T15:44:29","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51520.html"},"modified":"2025-08-10T23:44:29","modified_gmt":"2025-08-10T15:44:29","slug":"%e8%b0%b7%e6%ad%8c%e9%82%ae%e7%ae%b1smtp%e6%9c%8d%e5%8a%a1%e5%99%a8%e8%bf%9e%e6%8e%a5%e5%bc%82%e5%b8%b8%ef%bc%9amailconnectexception-couldnt-connect-to-host-port-smtp-gmail-com-587","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51520.html","title":{"rendered":"\u8c37\u6b4c\u90ae\u7bb1SMTP\u670d\u52a1\u5668\u8fde\u63a5\u5f02\u5e38\uff1aMailConnectException: Couldn\u2018t connect to host, port: smtp.gmail.com, 587"},"content":{"rendered":"

1\u3001SpringBoot\u53d1\u9001\u90ae\u4ef6<\/h2>\n

\u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528 Spring Boot \u53d1\u9001\u90ae\u4ef6\u7684\u6700\u5c0f\u5b8c\u6574\u793a\u4f8b\u3002\u8fd9\u4e2a\u793a\u4f8b\u4f7f\u7528 Gmail \u7684 SMTP \u670d\u52a1，\u53d1\u9001\u4e00\u5c01\u7b80\u5355\u7684\u7eaf\u6587\u672c\u90ae\u4ef6\u3002<\/p>\n

\u524d\u63d0\u8981\u6c42：\u4f7f\u7528idea\u7684\u5f15\u5bfc\u642d\u5efa\u4e00\u4e2aSpringBoot\u7684web\u9879\u76ee\u57fa\u7840\u6846\u67b6\u3002<\/p>\n

1. \u9879\u76ee\u4f9d\u8d56<\/h4>\n

\u9996\u5148，\u5728\u4f60\u7684 pom.xml \u6587\u4ef6\u4e2d\u6dfb\u52a0 Spring Boot Mail Starter \u4f9d\u8d56\u3002<\/p>\n

<<\/span>dependencies<\/span>><\/span><\/span>
\n <<\/span>dependency<\/span>><\/span><\/span>
\n <<\/span>groupId<\/span>><\/span><\/span>org.springframework.boot<\/<\/span>groupId<\/span>><\/span><\/span>
\n <<\/span>artifactId<\/span>><\/span><\/span>spring-boot-starter-mail<\/<\/span>artifactId<\/span>><\/span><\/span>
\n <\/<\/span>dependency<\/span>><\/span><\/span>
\n<\/<\/span>dependencies<\/span>><\/span><\/span><\/p>\n

2. \u5e94\u7528\u914d\u7f6e<\/h4>\n

\u5728 src\/main\/resources\/application.properties \u6587\u4ef6\u4e2d，\u914d\u7f6e\u90ae\u4ef6\u670d\u52a1\u5668\u7684\u8fde\u63a5\u4fe1\u606f\u3002\u8fd9\u91cc\u4ee5 Gmail \u4e3a\u4f8b，\u4f60\u9700\u8981\u5c06 your@gmail.com \u548c your-app-password \u66ff\u6362\u4e3a\u4f60\u81ea\u5df1\u7684\u90ae\u7bb1\u5730\u5740\u548c\u5e94\u7528\u5bc6\u7801\u3002<\/p>\n

\u6ce8\u610f：\u4e3a\u4e86\u5b89\u5168，Gmail \u7b49\u670d\u52a1\u63d0\u4f9b\u5546\u901a\u5e38\u9700\u8981\u4f60\u751f\u6210\u4e00\u4e2a\u5e94\u7528\u4e13\u7528\u5bc6\u7801 (App Password)，\u800c\u4e0d\u662f\u76f4\u63a5\u4f7f\u7528\u4f60\u7684\u8d26\u6237\u767b\u5f55\u5bc6\u7801\u3002<\/p>\n

# \u90ae\u4ef6\u670d\u52a1\u5668\u914d\u7f6e
\nspring.mail.host=smtp.gmail.com
\nspring.mail.port=587
\nspring.mail.username=your@gmail.com
\nspring.mail.password=your-app-password #\u6ce8\u610f：\u8fd9\u91cc\u7684\u5bc6\u7801\u662f\u5e94\u7528\u4e13\u7528\u5bc6\u7801，\u800c\u4e0d\u662f\u8c37\u6b4c\u90ae\u7bb1\u7684\u8d26\u53f7\u5bc6\u7801<\/p>\n

# \u542f\u7528 SMTP \u8ba4\u8bc1\u548c TLS \u52a0\u5bc6
\nspring.mail.properties.mail.smtp.auth=true
\nspring.mail.properties.mail.smtp.starttls.enable=true<\/p>\n

3. \u521b\u5efa\u90ae\u4ef6\u670d\u52a1\u7c7b<\/h4>\n

\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 Service \u7c7b\u6765\u5c01\u88c5\u90ae\u4ef6\u53d1\u9001\u903b\u8f91\u3002Spring Boot \u4f1a\u81ea\u52a8\u914d\u7f6e JavaMailSender bean，\u4f60\u53ef\u4ee5\u76f4\u63a5\u6ce8\u5165\u4f7f\u7528\u3002<\/p>\n

import<\/span> org.<\/span>springframework.<\/span>beans.<\/span>factory.<\/span>annotation.<\/span><\/span>Value<\/span>;<\/span>
\nimport<\/span> org.<\/span>springframework.<\/span>mail.<\/span><\/span>SimpleMailMessage<\/span>;<\/span>
\nimport<\/span> org.<\/span>springframework.<\/span>mail.<\/span>javamail.<\/span><\/span>JavaMailSender<\/span>;<\/span>
\nimport<\/span> org.<\/span>springframework.<\/span>stereotype.<\/span><\/span>Service<\/span>;<\/span><\/p>\n

@Service<\/span>
\npublic<\/span> class<\/span> EmailService<\/span> {<\/span><\/p>\n

private<\/span> final<\/span> JavaMailSender<\/span> mailSender;<\/span>
\n @Value<\/span>(<\/span>"${spring.mail.username}"<\/span>)<\/span> \/\/ \u6ce8\u5165\u914d\u7f6e\u6587\u4ef6\u4e2d\u7684\u503c<\/span>
\n private<\/span> String<\/span> fromEmail;<\/span><\/p>\n

public<\/span> EmailService<\/span>(<\/span>JavaMailSender<\/span> mailSender)<\/span> {<\/span>
\n this<\/span>.<\/span>mailSender =<\/span> mailSender;<\/span>
\n }<\/span><\/p>\n

public<\/span> void<\/span> sendSimpleEmail<\/span>(<\/span>String<\/span> toEmail,<\/span> String<\/span> subject,<\/span> String<\/span> body)<\/span> {<\/span>
\n SimpleMailMessage<\/span> message =<\/span> new<\/span> SimpleMailMessage<\/span>(<\/span>)<\/span>;<\/span>
\n message.<\/span>setFrom<\/span>(<\/span>fromEmail)<\/span>;<\/span> \/\/ \u53d1\u4ef6\u4eba\u5730\u5740<\/span>
\n message.<\/span>setTo<\/span>(<\/span>toEmail)<\/span>;<\/span> \/\/ \u6536\u4ef6\u4eba\u5730\u5740<\/span>
\n message.<\/span>setSubject<\/span>(<\/span>subject)<\/span>;<\/span> \/\/ \u90ae\u4ef6\u4e3b\u9898<\/span>
\n message.<\/span>setText<\/span>(<\/span>body)<\/span>;<\/span> \/\/ \u90ae\u4ef6\u6b63\u6587<\/span>
\n mailSender.<\/span>send<\/span>(<\/span>message)<\/span>;<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u90ae\u4ef6\u53d1\u9001\u6210\u529f!"<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

4. \u521b\u5efa\u4e00\u4e2a Web \u63a7\u5236\u5668\u6765\u6d4b\u8bd5<\/h4>\n

\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 RestController，\u901a\u8fc7 HTTP \u8bf7\u6c42\u6765\u89e6\u53d1\u90ae\u4ef6\u53d1\u9001\u3002<\/p>\n

import<\/span> org.<\/span>springframework.<\/span>beans.<\/span>factory.<\/span>annotation.<\/span><\/span>Autowired<\/span>;<\/span>
\nimport<\/span> org.<\/span>springframework.<\/span>web.<\/span>bind.<\/span>annotation.<\/span><\/span>GetMapping<\/span>;<\/span>
\nimport<\/span> org.<\/span>springframework.<\/span>web.<\/span>bind.<\/span>annotation.<\/span><\/span>RequestParam<\/span>;<\/span>
\nimport<\/span> org.<\/span>springframework.<\/span>web.<\/span>bind.<\/span>annotation.<\/span><\/span>RestController<\/span>;<\/span><\/p>\n

@RestController<\/span>
\npublic<\/span> class<\/span> EmailController<\/span> {<\/span><\/p>\n

private<\/span> final<\/span> EmailService<\/span> emailService;<\/span><\/p>\n

public<\/span> EmailController<\/span>(<\/span>EmailService<\/span> emailService)<\/span> {<\/span>
\n this<\/span>.<\/span>emailService =<\/span> emailService;<\/span>
\n }<\/span><\/p>\n

@GetMapping<\/span>(<\/span>"\/send-email"<\/span>)<\/span>
\n public<\/span> String<\/span> sendEmail<\/span>(<\/span>@RequestParam<\/span> String<\/span> to<\/span>)<\/span> {<\/span>
\n emailService.<\/span>sendSimpleEmail<\/span>(<\/span>to<\/span>,<\/span> "\u8fd9\u662f\u4e00\u5c01\u6d4b\u8bd5\u90ae\u4ef6"<\/span>,<\/span> "\u4f60\u597d，\u8fd9\u662f\u4e00\u5c01\u7531 Spring Boot \u53d1\u9001\u7684\u7eaf\u6587\u672c\u90ae\u4ef6\u3002"<\/span>)<\/span>;<\/span>
\n return<\/span> "\u90ae\u4ef6\u53d1\u9001\u8bf7\u6c42\u5df2\u63d0\u4ea4！\u8bf7\u68c0\u67e5\u4f60\u7684\u90ae\u7bb1\u3002"<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

5. \u4e3b\u5e94\u7528\u7c7b<\/h4>\n

\u8fd9\u662f Spring Boot \u5e94\u7528\u7684\u5165\u53e3\u3002<\/p>\n

import<\/span> org.<\/span>springframework.<\/span>boot.<\/span><\/span>SpringApplication<\/span>;<\/span>
\nimport<\/span> org.<\/span>springframework.<\/span>boot.<\/span>autoconfigure.<\/span><\/span>SpringBootApplication<\/span>;<\/span><\/p>\n

@SpringBootApplication<\/span>
\npublic<\/span> class<\/span> MailApplication<\/span> {<\/span><\/p>\n

public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
\n SpringApplication<\/span>.<\/span>run<\/span>(<\/span>MailApplication<\/span>.<\/span>class<\/span>,<\/span> args)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u8fd0\u884c\u548c\u6d4b\u8bd5<\/h4>\n
  • \u8fd0\u884c MailApplication \u7c7b\u3002<\/li>\n
  • \u6253\u5f00\u6d4f\u89c8\u5668\u6216\u4f7f\u7528\u5de5\u5177（\u5982 Postman），\u8bbf\u95ee\u4ee5\u4e0b URL：
    \nhttp:\/\/localhost:8080\/send-email?to=target@example.com
    \n\u8bf7\u5c06 target@example.com \u66ff\u6362\u4e3a\u5b9e\u9645\u7684\u6536\u4ef6\u4eba\u90ae\u7bb1\u5730\u5740\u3002<\/li>\n

    \u5982\u679c\u4e00\u5207\u914d\u7f6e\u6b63\u786e，\u4f60\u4f1a\u5728\u63a7\u5236\u53f0\u770b\u5230\u201c\u90ae\u4ef6\u53d1\u9001\u6210\u529f!\u201d\u7684\u8f93\u51fa，\u5e76\u4e14\u6536\u4ef6\u4eba\u4f1a\u6536\u5230\u8fd9\u5c01\u6d4b\u8bd5\u90ae\u4ef6\u3002<\/p>\n

    2\u3001\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\u9047\u5230\u7684\u95ee\u9898：MailConnectException<\/h2>\n

    \u9879\u76ee\u542f\u52a8\u540e，\u6d4b\u8bd5\u62a5\u9519：
    \norg.springframework.mail.MailSendException: Mail server connection failed. Failed messages: org.eclipse.angus.mail.util.MailConnectException: Couldn\u2019t connect to host, port: smtp.gmail.com, 587; timeout -1;<\/p>\n

    \u8fd9\u4e2a\u62a5\u9519\u7684\u539f\u56e0\u662f\u4e0d\u80fd\u8fde\u63a5\u5230\u8c37\u6b4c\u7684SMTP\u670d\u52a1\u5668\u3002<\/p>\n

    3\u3001\u89e3\u51b3\u529e\u6cd5<\/h2>\n

    \u9996\u5148，\u4f60\u9700\u8981\u5728\u8c37\u6b4c\u7684\u8d26\u53f7\u8bbe\u7f6e\u9875\u9762\u5f00\u542f\u767b\u5f55\u7684\u201c\u4e24\u6b65\u9a8c\u8bc1\u201d，\u6309\u7167\u63d0\u793a\u8981\u6c42\u6765\u5c31\u884c\u3002
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u5176\u6b21，\u4e0d\u9700\u8981\u8bbe\u7f6e\u8c37\u6b4c\u90ae\u7bb1\u7684POP\u6216\u8005IMAP\u3002\u5f88\u591a\u9648\u65e7\u7684\u6280\u672f\u535a\u5ba2\u8bf4\u8981\u5f00\u542fPOP\u6216\u8005IMAP，\u76ee\u524d（2025\u5e748\u67086\u65e5）\u662f\u4e0d\u9700\u8981\u8bbe\u7f6e\u7684，\u8c37\u6b4c\u90ae\u7bb1\u7684POP\u9ed8\u8ba4\u662f\u5173\u95ed\u72b6\u6001，IMAP\u9ed8\u8ba4\u662f\u5f00\u542f\u72b6\u6001，SMTP\u670d\u52a1\u8fde\u540cIMAP\u4e00\u8d77\u662f\u9ed8\u8ba4\u5f00\u542f\u3002
    \n\u5982\u679c\u4f7f\u7528\u7684\u662f\u5176\u5b83\u90ae\u7bb1\u7684SMTP\u670d\u52a1\u53d1\u9001\u90ae\u4ef6，\u5219\u5177\u4f53\u4ee5\u5176\u5b83\u90ae\u7bb1\u7684\u8bf4\u660e\u4e3a\u51c6\u3002
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u7136\u540e，\u5728\u8c37\u6b4c\u8bbe\u7f6e\u9875\u9762\u641c\u7d22\u6846\u4e2d\u641c\u7d22\u201c\u5e94\u7528\u4e13\u7528\u5bc6\u7801\u201d
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u7136\u540e\u968f\u4fbf\u8f93\u5165\u4e00\u4e2a\u540d\u79f0，\u70b9\u51fb\u521b\u5efa\u3002
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
    \n\u7136\u540e\u4f1a\u51fa\u73b0\u4e00\u4e2a16\u4f4d\u6570\u5b57\u7684\u5bc6\u7801，\u5176\u683c\u5f0f\u7c7b\u4f3c\u201caaaa bbbb cccc dddd"，\u8fd9\u4e2a\u5bc6\u7801\u53ea\u51fa\u73b0\u4e00\u6b21，\u52a1\u5fc5\u8bb0\u4e0b\u6765\u3002
    \n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u63a5\u7740\u8f6c\u5230Spring Boot\u7684\u914d\u7f6e\u6587\u4ef6（\u6bd4\u5982application.properties)，\u5c06\u5bc6\u7801\u586b\u5230\u5982\u4e0b\u4f4d\u7f6e：
    \nspring.mail.password=aaaabbbbccccdddd
    \n\u8fd9\u4e2a\u5bc6\u7801\u4e2d\u95f4\u4e0d\u8981\u6709\u4efb\u4f55\u7a7a\u683c，\u4e5f\u4e0d\u8981\u4f7f\u7528\u5f15\u53f7\u5305\u56f4\u3002\u6211\u6d4b\u8bd5\u7684\u65f6\u5019\u62a5\u9519，\u5c31\u662f\u56e0\u4e3a\u8fd9\u91cc\u51fa\u95ee\u9898\u4e86，\u8c37\u6b4c\u5b98\u65b9\u7ed9\u7684\u5bc6\u7801\u662f\u6709\u7a7a\u683c\u7684，\u9700\u8981\u628a\u7a7a\u683c\u5220\u6389\u3002<\/p>\n

    \u5982\u679c\u8fd9\u4e2a\u5730\u65b9\u8bbe\u7f6e\u6210\u4e0b\u9762\u8fd9\u6837，\u5c31\u4f1a\u62a5\u9519：
    \nspring.mail.password=aaaa bbbb cccc dddd
    \nspring.mail.password=\u201caaaa bbbb cccc dddd\u201d<\/p>\n

    \u6309\u7167\u4e0a\u9762\u914d\u7f6e\u540e，\u91cd\u542f\u670d\u52a1，\u7136\u540e\u6d4b\u8bd5，\u5c31\u80fd\u6536\u5230\u8c37\u6b4c\u53d1\u8fc7\u6765\u7684\u6d4b\u8bd5\u90ae\u4ef6\u4e86\u3002<\/p>\n

    \u53c2\u8003\u535a\u5ba2：
    \n\u5982\u4f55\u4f7f\u7528Gmail\u7684SMTP\u670d\u52a1\u5668\u53d1\u9001\u90ae\u4ef6：https:\/\/www.vpsdawanjia.com\/9613.html<\/p>\n","protected":false},"excerpt":{"rendered":"

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