1、查看mailx是否安装
安装命令：
yum install mailx -y
查看是否安装：
which mail
mail -V
2、修改配置
在邮箱中开启smtp服务，并生成授权码
修改阿里云服务器端的配置：
vim /etc/mail.rc
文件中加入以下参数：
set [email protected]
set smtp=“smtps://smtp.qq.com:465”
set [email protected]
set smtp-auth-password=aaaaaaaaaaaa #授权码
set smtp-auth=login
set ssl-verify=ignore
set nss-config-dir=/etc/pki/nssdb/
阿里云smtp的25端口是被封掉了，这里使用465加密端口
添加完成后cat查看无乱码即可
cat -A /etc/mail.rc
3、使用mail发送邮件测试
三种方式发送邮件：
- 命令行: mail -s “theme” addressee,回车后输入内容按Ctrl+D发送邮件.
- 管道符: echo “mail main content” | mail -s “theme” addressee
- 文件内容作为邮件内容: mail -s “theme” addressee < /tmp/t.txt
[root@yx01 ~]# echo 'hello' |mail -v -s "test" [email protected]
Resolving host smtp.qq.com . . . done.
Connecting to 183.3.225.42:465 . . . connected.
Error in certificate: Peer's certificate issuer has been marked as not trusted by the.
Comparing DNS name: "*.mail.qq.com"
Comparing DNS name: "993.dav.qq.com"
Comparing DNS name: "993.eas.qq.com"
Comparing DNS name: "993.imap.qq.com"
Comparing DNS name: "993.pop.qq.com"
Comparing DNS name: "993.smtp.qq.com"
Comparing DNS name: "imap.qq.com"
Comparing DNS name: "mx1.qq.com"
Comparing DNS name: "mx2.qq.com"
Comparing DNS name: "mx3.qq.com"
Comparing DNS name: "pop.qq.com"
Comparing DNS name: "smtp.qq.com"
SSL parameters: cipher=AES-128-GCM, keysize=128, secretkeysize=128,
issuer=CN=GlobalSign Organization Validation CA - SHA256 - G2,O=GlobalSign nv-sa,C=BE
subject=CN=*.mail.qq.com,O=Shenzhen Tencent Computer Systems Company Limited,L=shenzhen,ST=guangdong,C=CN
220 newxmesmtplogicsvrsza9.qq.com XMail Esmtp QQ Mail Server.
>>> EHLO yx01
250-newxmesmtplogicsvrsza9.qq.com
250-PIPELINING
250-SIZE 73400320
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN
250-MAILCOMPRESS
250 8BITMIME
>>> AUTH LOGIN
334 VXNlcm5hbWU6
>>> eXV4aWFuZzE5OTMwNzI1QHFxLmNvbQ==
334 UGFzc3dvcmQ6
>>> Z3dyeGp4YmFvc2p4ZGVlYQ==
235 Authentication successful
>>> MAIL FROM:<username@qq.com>
250 OK.
>>> RCPT TO:<username@qq.com>
250 OK
>>> DATA
354 End data with <CR><LF>.<CR><LF>.
>>> .
250 OK: queued as.
>>> QUIT
221 Bye.
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4、解决证书问题
上述步骤完成后，发送邮件虽然可以成功，但服务器终端会出现证书不被信任的回显
Error in certificate: Peer’s certificate issuer has been marked as not trusted by the.
完成下面步骤设置后不会出现上面的回显了
cd /etc/pki/nssdb
echo -n | openssl s_client -connect smtp.qq.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ./qq.crt
certutil -A -n "GeoTrust SSL CA" -t "C,," -d /etc/pki/nssdb/ -i /etc/pki/nssdb/qq.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d /etc/pki/nssdb/ -i /etc/pki/nssdb/qq.crt
certutil -L -d /etc/pki/nssdb/
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ./ -i qq.crt