SMTP发送邮件时抱No appropriate protocol错误分析和解决方案

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已于 2023-09-18 14:16:19 修改

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分类专栏：精萃集文章标签：开发语言 ssl smtp

于 2023-09-18 11:44:34 首次发布

本文链接：https://blog.youkuaiyun.com/feeltouch/article/details/132969510

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本文分析了在使用Java SMTP发送邮件时遇到的'No appropriate protocol' SSL错误，原因是JDK 1.8.0_333禁用了TLSv1和TLSv1.1。解决方案包括切换到未禁用TLS版本的JDK或在代码中指定SMTP传输版本。

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基础环境：JDK 1.8.0_333

一、具体错误

Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)

Exception in thread "main" org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
  nested exception is:
	javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate). Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
  nest

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