centos上mailx經過465端口發送郵件

最近在看zabbix發送郵件的時候，發現本身的郵件老是沒法發送，這裏多是外網防火牆禁止25端口，那麼如何繞過25端口呢？

 我使用的是163郵箱的TSL加密協議465端口

因爲mailx基本配置很簡單，在這裏就不作詳細描述，只說如何能經過465端口發送郵件

 

 

首先請求數字證書

root@PLAY ~]# mkdir -p /root/.certs/                           ####建立目錄，用來存放證書
[root@PLAY ~]# echo -n | openssl s_client -connect smtp.163.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/163.crt ####向163請求證書
depth=2 C = US, O = GeoTrust Inc., CN = GeoTrust Global CA
verify return:1
depth=1 C = US, O = GeoTrust Inc., CN = GeoTrust SSL CA - G3
verify return:1
depth=0 C = CN, ST = Zhejiang, L = Hangzhou, O = "NetEase (Hangzhou) Network Co., Ltd", OU = MAIL Dept., CN = *.163.com
verify return:1
DONE
[root@PLAY ~]# certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/163.crt                  ####添加一個證書到證書數據庫中
[root@PLAY ~]# certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/163.crt               ####添加一個證書到證書數據庫中
[root@PLAY ~]# certutil -L -d /root/.certs                                                                                         ####列出目錄下證書
Certificate Nickname Trust Attributes
SSL,S/MIME,JAR/XPI
GeoTrust SSL CA

 而後前往163郵箱打開smtp並獲取客戶端受權碼

    網頁正上方：設置→POP3/SMTP/IMAP

 

    網頁左側：客戶端受權密碼

 

最後配置/etc/mail.rc

set bsdcompat

set from=17737156701@163.com
set smtp=smtps://smtp.163.com:465
set smtp-auth-user=17737156701@163.com
set smtp-auth-password=*********
set smtp-auth=login
set ssl-verify=ignore
set nss-config-dir=/root/.certs

如今發送測試郵件

 

echo "zabbix test mail" | mail -s "zabbix" 18396163@qq.com

登陸QQ郵箱查看

看起來已經成功了，可是發送完郵件還有報錯：證書不被信任，且命令行就此卡住，須要按鍵才能出現命令提示符

 Error in certificate: Peer's certificate issuer is not recognized.

 因而

[root@PLAY ~]# cd /root/.certs/
[root@PLAY .certs]# ll
total 80
-rw-r--r-- 1 root root 1793 Jul 6 14:36 163.crt
-rw------- 1 root root 65536 Jul 6 14:37 cert8.db
-rw------- 1 root root 16384 Jul 6 14:37 key3.db
-rw------- 1 root root 16384 Jul 6 14:37 secmod.db
[root@PLAY .certs]# certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ./ -i 163.crt
Notice: Trust flag u is set automatically if the private key is present.

 問題解決

 

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