java发送邮件报错，Could not connect to SMTP host: smtp.exmail.qq.com, port: 465

发现问题

我使用的 docker 运行的 jdk 环境，服务调用发送邮件报错

javax.mail.MessagingException: Could not connect to SMTP host: smtp.exmail.qq.com, port: 465;nested exception is:javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1961)at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:654)at javax.mail.Service.connect(Service.java:317)at javax.mail.Service.connect(Service.java:176)at javax.mail.Service.connect(Service.java:125)at javax.mail.Transport.send0(Transport.java:194)at javax.mail.Transport.send(Transport.java:124)at com.nlelpct.common.network.utils.XMailUtil.run(XMailUtil.java:204)at com.nlelpct.common.network.controller.MailboxController.sendMailByCurrent(MailboxController.java:437)at sun.reflect.GeneratedMethodAccessor77.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)at sun.security.ssl.HandshakeContext.<init>(HandshakeContext.java:171)at sun.security.ssl.ClientHandshakeContext.<init>(ClientHandshakeContext.java:103)at sun.security.ssl.TransportContext.kickstart(TransportContext.java:220)at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:433)at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:549)at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:354)at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:211)at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1927)

解决方案

由于是java 版本的问题，其中jdk.tls.disabledAlgorithms指定了被禁用的算法和协议版本。
打开 java 目录

# 查找容器内 java 目录
which java

修改java.security文件：删除掉SSL3,TLSv1, TLSv1.1

sed -i 's/SSLv3, TLSv1, TLSv1.1, //g' /usr/local/openjdk-8/jre/lib/security/java.security