解决springboot项目部署到服务器邮箱无法发送邮件而本地可以问题（亲测有用）
前言：由于SpringBoot项目有发送邮箱功能，但是部署到服务器上却出现无法发送问题！但是本地却可以！！大致看了一下应该是端口的问题！
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.mail.MailSendException: Mail server connection failed; nested exception is com.sun.mail.util.MailConnectException: Couldn't connect to host, port: , 25; timeout -1;nested exception is:.ConnectException: Connection timed out (Connection timed out). Failed messages: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: , 25; timeout -1;nested exception is:.ConnectException: Connection timed out (Connection timed out); message exceptions (1) are:Failed message 1: com.sun.mail.util.MailConnectException: Couldn't connect to host, port: , 25; timeout -1;nested exception is:.ConnectException: Connection timed out (Connection timed out)] with root cause
前篇踩雷：试了网友的这个方法！试了没有用！（也可能自己项目用不了吧！！也不能说别人的没啥用哈哈哈哈）
后来：翻了别的csdn，试了可以用！
在application.properties添加以下代码
# SSL Configspring.mail.port=465spring.mail.protocol=smtpspring.mail.default-encoding=UTF-8spring.mail.properties.mail.smtp.ssl.enable=truespring.mail.properties.mail.smtp.socketFactory.port=465spring.mail.properties.mail.smtp.socketFactory.class=.ssl.SSLSocketFactory
即为：
参考文章：阿里云发送不了邮件，SpringBoot 使用SSL邮箱发送邮件
成功啦！！！！！！！
