服务器centos实现邮件发送

朱雀 2022-02-12 15:01 364阅读 0赞

*  1、 安装mailx

yum –y install mailx

*  2、 生成证书

mkdir -p /root/.certs/  
echo -n | openssl s\_client -connect [smtp.qq.com:465][smtp.qq.com_465] | sed -ne ‘/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p’ > ~/.certs/qq.crt  
certutil -A -n “GeoTrust SSL CA” -t “C,” -d ~/.certs -i ~/.certs/qq.crt  
certutil -A -n “GeoTrust Global CA” -t “C,” -d ~/.certs -i ~/.certs/qq.crt  
certutil -A -n “GeoTrust SSL CA - G3” -t “Pu,Pu,Pu” -d ~/.certs/./ -i qq.crt  
certutil -L -d /root/.certs

*  3、 修改mail.rc

Vi /etc/mail.rc  
set [from=example@qq.com][from_example_qq.com]  
set smtp=smtps://smtp.qq.com:465  
set [smtp-auth-user=example@qq.com][smtp-auth-user_example_qq.com]  
set smtp-auth-password=\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
set smtp-auth=login  
set ssl-verify=ignore  
set nss-config-dir=/root/.certs  
说明：如果是465端口，需要加上smtps://协议；如果是587端口，不需要加smtps://或者写smtp://；

如果使用587端口通讯，应当显示设置smtp-use-starttls；

邮件的来源应当与邮箱相同，或者将发信人姓名写在邮箱后的括号中。例如：set from=user@xxxx.com或set [from=user@xxx.com][from_user_xxx.com](nickname)；如果邮箱与认证的不一致，将出现“smtp-server: 553 Mail from must equal authorized user”的错误；

有些邮件服务器的587端口不是使用STARTTLS而是SMTPS，此时仍需加上smtps://协议，例如126邮箱。

*  4、 发送邮件

echo “hello world” | mail -s ‘didi’ [xxxx@163.com][xxxx_163.com]

*  5、 把证书放进tomcat默认路径
 *  6、 cd /usr/java/jre1.8.0\_73/lib/security/

keytool -import -alias cm.crt -keystore cacerts -file /usr/.certs/cm.crt -trustcacerts  
密码：changeit  
Yes  
7、 修改代码，实现java发送邮件  
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());  
final String SSL\_FACTORY = “javax.net.ssl.SSLSocketFactory”;  
//设置邮件会话参数  
Properties props = new Properties();  
//邮箱的发送服务器地址  
props.setProperty(“mail.smtp.host”, “[smtp.qq.com][]”);  
props.setProperty(“mail.smtp.socketFactory.class”, SSL\_FACTORY);  
props.setProperty(“mail.smtp.socketFactory.fallback”, “false”);  
//邮箱发送服务器端口,这里设置为465端口  
props.setProperty(“mail.smtp.port”, “465”);  
props.setProperty(“mail.smtp.socketFactory.port”, “465”);  
props.put(“mail.smtp.auth”, “true”);  
final String username = ["xxxx@qq.com][xxxx_qq.com]"; //发送者邮箱用户名  
final String password = “xxxxxxx”;

[smtp.qq.com_465]: http://smtp.qq.com:465
[from_example_qq.com]: mailto:from=example@qq.com
[smtp-auth-user_example_qq.com]: mailto:smtp-auth-user=example@qq.com
[from_user_xxx.com]: mailto:from=user@xxx.com
[xxxx_163.com]: mailto:xxxx@163.com
[smtp.qq.com]: http://smtp.qq.com
[xxxx_qq.com]: mailto:%22xxxx@qq.com