Could not connect to SMTP host localhost port 25

最新推荐文章于 2024-08-26 09:30:04 发布

原创最新推荐文章于 2024-08-26 09:30:04 发布 · 2.2k 阅读

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本文详细解析了JavaMail在发送邮件时遇到的SMTP连接问题，包括错误描述、原因分析及具体解决办法。通过配置正确的SMTP服务主机，确保邮件发送功能正常运行。

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1、错误描述

DEBUG: setDebug: JavaMail version 1.3.3DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]DEBUG SMTP: useEhlo true, useAuth trueDEBUG SMTP: trying to connect to host "localhost", port 25, isSSL falseException in thread "main" javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;  nested exception is: java.net.ConnectException: Connection refused: connect at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1227) at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:322) at javax.mail.Service.connect(Service.java:236) at javax.mail.Service.connect(Service.java:137) at com.you.mail.model.SendMessage.sendMessage(SendMessage.java:70) at com.you.mail.model.SendMessage.main(SendMessage.java:89)

2、错误原因

从报错可知，无法连接SMTP服务主机

3、解决办法

配置正确的SMTP服务主机，保证服务连接上

String server = "smtp.163.com";String username = "";String password = "";  Transport transport = session.getTransport();transport.connect(server, username, password);transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));transport.close();