Linux服务器发送邮件-阿里云

linux服务器无法发送邮件我的centos6.9的无法发送邮件，telnet smtp.qq.com不通，163的smtp也不通，请问有朋友知道什么回事？怎么去排查吗？发送邮件时报以下错误： "/root/dead.letter" 11/299 . . . message not sent....

linux服务器下发送邮件系统管理人员经常会遇到对于设备或者任务的预警与通知，通常情况有发送短信、邮件等方式。发送短信一般来说需要有短信猫（硬件）或者调用libfetion给飞信用户发送。本文介绍几种简单的发送邮件的方式。本文环境：Ubuntu 10.04基础： &...

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