I was lucky that able to get 1 month free subscriptions on Qwiklabs and finished some of their quest. Good way to get your hand dirty and know how to use these tools. Sadly that promotion ended 31th July. Kubernets is really changing the way of software deployments. Docker was starting to popular 4-5 years …
CentOS 6 1. 移除sendmail 安裝postfix
2. Gmail username and password Simple Authentication and Security Layer (SASL)
3. Postfix 設定 vim /etc/postfix/main.cf
CApath here, not CAfile 4. 重新啟動Postfix
5. Google 安全性設定 https://myaccount.google.com/security 「我的帳戶」> 「低安全性應用程式」專區 > 「安全性較低的應用程式存取權限」旁邊的 [啟用] 6. 測試mail server 是否有正常寄信 寄信俾自己
後記: Goolge 可能係最近才有這個安全性設定，大多數reference 都沒有提及，搞到我白忙一場。 不同Linux distro, CA file name 有分別。
goo.gl/a1ZC represent here ~ by Google URL Shortner