ubuntu 安装 sendmail
1.首先安装sendmail sudo apt-get install sendmail2.修改配置：Sendmail默认只会为本机用户发送邮件，现在修改文件/etc/mail/sendmail.cf要它可以对internet发送邮件vi /etc/mail/sendmail.mc找到： AEMON_OPTIONS(`Family=inet,Name=MSP-v4, Port=submission, M=Ea, Addr=127.0.0.1')dnl修改为： AEMON_OPTIONS(`Family=inet,Name=MSP-v4, Port=submission, M=Ea, Addr=0.0.0.0')dnl保存
备份原配置文件
#mv /etc/mail/sendmail.cf /etc/mail/sendmail.cf.bak
生成新的配置文件#/etc/mail/m4 sendmail.mc > /etc/mail/sendmail.cf
3.mail测试：echo "test mail ok" | mail -s "test mail ok" xxx@163.com发生错误：The program 'mail' is currently not installed.You can install it by typing:sudo apt-get install mailutils
根据提示安装mailutils： sudo apt-get install mailutils
再测试，如果没有立即发出，而是阻塞，查看日志/var/log/mail.log可能出现如下错误信息:Oct 13 00:46:39 ubuntu sendmail: My unqualified host name (ubuntu) unknown; sleeping for retry解决：vi /etc/hosts修改 127.0.0.1 ubuntu 为 127.0.0.1 ubuntu ubuntu.com
再测试，成功收到邮件。
4.如果没有收到邮件，检查邮件队列是否为空/usr/lib/sendmail -bp邮件日志：/var/log/mail.log/var/log/mail.error如果队列出现问题，查阅相关资料。。。
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