RHCE - SENDMAIL

EASY STEPS to setup SENDMAIL
SENDMAIL
http://linux.vbird.org/linux_server/0380sendmail.php

MY PC IP 192.168.2.121
hostname: mail.waliunx.com

step:1 :
work file: /etc/mail/sendmail.mc
所以我们不修改cf文件,我们通过修改sendmail.mc文件用m4工具来生成cf文件
- 要让其他client使用我们的服务器，我们要把127.0.0.1改成0.0.0.0 (DAEMON_OPTIONS: 0.0.0.0)
- 改成你自己的域名 (walinux.com)

step2:
work file: /etc/mail/local-host-names
退出以后修改本目录的local-host-names目录
在这个文件中加入你IP地址能解析出来的所有域名
i.e. walinux.com

step3:
working file:/etc/hosts
192.168.2.121 mail.walinux.com mail

step 4:
work dir: /etc/dir
DNS record
@ IN MX 1 mail.walinux.com
mail IN A 192.168.2.121
{still not sure to add this point entry : 121 IN PTR mail.waliunx.com ]

step5:
work dir: /etc/mail
m4 sendmail.mc > sendmail.cf
service sendmail restart

Step 6:
alias send email to a group
vim /etc/alias
user: user,kevin,student

#newaliases

step 7:
establish POP3 ,IMAP
yum install dovecot
cd /etc/pki/tls/certs
make dovecot.pem