Linux之邮件服务

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1.限制远程用户
vim /etc/postfix/access
ip   REJECT
postconf -d |grep client           ##查看使用参数
postfix map                              ##加密
postconf -e "smtpd_client_restrictions=check_client_access hash:/etc/postfix/access"     ##写入文件

vim /etc/postfix/main.cf            ##查看最后一行是否添加以上信息（注意颜色）

注：其实，可以在main.cf 文件中添加smtpd_client_restrictions=check_client_access hash:/etc/postfix/access

systemctl restart postfix.service
验证：
在ip机上
1)telnet ip1 25
mail from:[email protected]
2)vim /etc/postfix/main.cf           ##删除最后一行
systemctl restart postfix.service
telnet ip1 25
mail from:[email protected]
rcpt to:[email protected]
data

.

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2.限制客户端指定用户发邮件
vim /etc/postfix/xxx
[email protected] REJECT
postmap xxx
postconf -e "smtpd_sender_restrictions=check_sender_access hash:/etc/postfix/xxx"
systemctl restart postfix.service
验证：
telnet ip1 25

mail from:[email protected]

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3.限制客户端指定用户收邮件
vim /etc/postfix/xxxx
[email protected] REJECT
postmap xxxx
postconf -e "smtpd_recipient_restrictions=check_recipient_access hash:/etc/postfix/xxx"

systemctl restart postfix.service

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4.邮件本地用户
服务端：
端口号
pop3 110
pop3S 995
imap 143
imaps 993
cat /etc/services |grep imap           ##查看imap 的端口号
vim /etc/dovecot/dovecot.conf
  24 protocols =imap pop3 lmpt 
  49 disable_plaintext_auth =no     ##明文认证
  50 login_trusted_networks =0.0.0.0/0
vim  /etc/dovecot/conf.d/10-mail.conf
  30 mail_location =mbox:~/mail:INBOX=/var/mail/%u
netstat -anltupe |grep dovecot
客户端：
telnet ip1 110
验证：
yum install mutt -y

mutt -f imap://username@ip1

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5.邮件虚拟用户
goupadd -g 888
useradd -g 888 -u 888 -s /sbin/nologin
在数据库中创建数据库mail，在mail库中创建表vuser，创建一些信息
例如：[email protected] 123 westos.org westos.org/admin/
      username        password   domain   maildir
在数据库中创建一个用户 postfix 并授权
编辑文件
vim /etc/postfix/mysql-users.cf
  hosts=localhost
  user=postfix
  password=postfix
  dbname =mail
  table= vuser
  select_field=username
  where_field=username
vim /etc/postfix/mysql-domain.cf
  hosts=localhost
  user=postfix
  password=postfix
  dbname =mail
  table= vuser
  select_field=domain
  where_field=domain
vim /etc/postfix/mysql-users.cf
  hosts=localhost
  user=postfix
  password=postfix
  dbname =mail
  table= vuser
  select_field=maildir
  where_field=username
postmap -q "[email protected]"mysql:/etc/postfix/mysql-users.cf
postmap -q "westos.org"mysql:/etc/postfix/mysql-domain.cf
postmap -q "[email protected]"mysql:/etc/postfix/mysql-maildir.cf
将数据写入配置文件
postconf -d |grep map
postconf -e "virtual_uid_maps=static:888"
postconf -e "virtual_gid_maps=static:888"
postconf -e "virtual_mailbox_base =/home/vmail"
postconf -e "virtual_alias_maps=mysql:/etc/postfix/mysql-users.cf"
postconf -e "virtual_virtual_mailbox_domains=mysql:/etc/postfix/mysql-domain.cf"
postconf -e "virtual_mailbox_maps=mysql:/etc/postfix/mysql-maildir.cf"

验证：mail [email protected]

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6.数据库和邮箱连接
yum install dovecot-mysql -y
cp -p /usr/share/doc/dovecot-2.2.10/example-config/dovecot-sql.conf.ext  /etc/dovecot
vim /etc/dovecot/dovecot-sql.conf.ext
  32 driver=mysql
  70 connect=host=localhost dbname=email user=postfix password=postfix
  106 password_query = \
  107 SELECT username,domain,password \
  108 FROM vuser WHERE username='%u' AND domain ='%d'
  124 user_query=SELECT maildir,888 AS uid,888 AS gid FROM vuser WHERE username='%u'
vim 10-mail.conf
  30 mail_location=maildir:/home/vmail/%d/%n
  168 first_valid_uid=888
  175 first_valid_gid=888
vim 10-auth.conf
  122 !include auth-system.conf.ext
  123 !include auth-sql.conf.ext
chmod +x /run/dovecot/
验证：
telnet ip1 110
user admin@westos/org

pass 123

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7.空壳邮件
空壳端：
vim /etc/resolv.conf
  nameserver ip
vim /etc/named.rfc1912.zones
  zone "westos,org" IN{
         type master;
         file "westos.org.zone";
         allow-update{none;};
};
cp -p /var/named/westos.com.zone /var/named/westos.org.zone
vim /var/named/westos/org.zone
  %s/com/org/g
vim /etc/postfix/main.cf
  75 myhostname=主机名
  83 mydomain =主机域名
  98 myorigin= westo.org
  113 inet_interfaces=all
  140 local_transport =error :local delivery disabled
  164 mydestination=
  313 relayhost=ip
systemctl stop firewalld
服务器：
vim /etc/postfix/main.cf
  264 mynetworks=ip
验证：
rm -fr /home/vmail/*
mail [email protected]
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