linux7.4邮件服务器,centos7搭建邮件服务器postfix

域名解析：

角色 记录类型 主机记录 记录值

主域名 A @ 104.225.233.249

邮件域名 A mail 104.225.233.249

邮件服务器 MX @ mail.dollarphp.com

反垃圾配置 TXT @ v=spf1 a mx ~al

卸载sendmail：

yum -y remove sendmail

安装软件：

yum -y install postfix dovecot cyrus-sasl-* mailx

配置postfix：

vim /etc/postfix/main.cf

queue_directory = /var/spool/postfix

command_directory = /usr/sbin

daemon_directory = /usr/libexec/postfix

data_directory = /var/lib/postfix

mail_owner = postfix

myhostname = mail.dollarphp.com #这里要换成你自己的邮箱服务器

mydomain = dollarphp.com #这里换成你自己的主机服务器

myorigin = $mydomain

inet_interfaces = all

inet_protocols = ipv4

mydestination = $myhostname, localhost.$mydomain, localhost,$mydomain,mail.$mydomain,www.$mydomain, ftp.$mydomain

local_recipient_maps =

unknown_local_recipient_reject_code = 550

mynetworks = 0.0.0.0/0

relay_domains = $mydestination

alias_maps = hash:/etc/aliases

alias_database = hash:/etc/aliases

home_mailbox = Maildir/

smtpd_banner = $myhostname ESMTP

debug_peer_level = 2

debugger_command =

PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin

ddd $daemon_directory/$process_name $process_id & sleep 5

sendmail_path = /usr/sbin/sendmail.postfix

newaliases_path = /usr/bin/newaliases.postfix

mailq_path = /usr/bin/mailq.postfix

setgid_group = postdrop

html_directory = no

manpage_directory = /usr/share/man

sample_directory = /usr/share/doc/postfix-2.10.1/samples

readme_directory = /usr/share/doc/postfix-2.10.1/README_FILES

smtpd_sasl_auth_enable = yes

smtpd_sasl_security_options = noanonymous

broken_sasl_auth_clients = yes

smtpd_recipient_restrictions = permit_sasl_authenticated,reject_unauth_destination,permit_mynetworks

smtpd_client_restrictions = permit_sasl_authenticated

配置dovecot：

a. 配置监听协议：

vim /etc/dovecot/dovecot.conf

protocols = imap pop3 lmtp

listen = *

dict {

}

!include conf.d/*.conf

!include_try local.conf

b. 配置登录方式：

vim /etc/dovecot/conf.d/10-auth.conf

disable_plaintext_auth = no

auth_mechanisms = plain login

!include auth-system.conf.ext

c. 配置邮件存储位置：

vim /etc/dovecot/conf.d/10-mail.conf

mail_location = maildir:~/Maildir

namespace inbox {

inbox = yes

}

first_valid_uid = 1000

mbox_write_locks = fcntl

d. 配置ssl(关闭)：

vim /etc/dovecot/conf.d/10-ssl.conf

ssl = no

ssl_cert =

ssl_key =

配置sasl2：

a. 配置系统认证：

vim /etc/sysconfig/saslauthd

SOCKETDIR=/run/saslauthd

MECH=shadow

FLAGS=

b. 配置登录方式(创建新文件)：

vim /usr/lib64/sasl2/smtpd.conf

pwcheck_method: saslauthd

mech_list: PLAIN LOGIN

log_level:3

添加用户：

useradd dollarphp

passwd dollarphp

启动服务：

systemctl start dovecot

systemctl start postfix

systemctl start saslauthd

配置mailx：

vim /etc/mail.rc

set hold

set append

set ask

set crt

set dot

set keep

set emptybox

set indentprefix="> "

set quote

set sendcharsets=iso-8859-1,utf-8

set showname

set showto

set newmail=nopoll

set autocollapse

set markanswered

ignore received in-reply-to message-id references

ignore mime-version content-transfer-encoding

fwdretain subject date from to

set bsdcompat

set [email protected]

set smtp=mail.dollarphp.com

set smtp-auth-user=adminmail

set smtp-auth-password=123456

set smtp-auth=login

发送邮件：

echo "内容" | mail -s "标题" [email protected]

或

mail -s "标题" [email protected] < test.txt

查看发送日志：

tail /var/log/maillog

二、客户端：

linux(接收)：

a. 安装telnet：

yum -y install telnet

b. 登录(dovecot的默认端口是110)：

telnet 104.225.233.249 110

c. 测试：

d. 命令介绍：

USER xxx：输入用户名

PASS xxx：输入密码

LIST：显示信箱

RETR n：打开第n封信

e. 退出telnet：

ctl+]

quit

windows(发送+接收)：

a. 安装foxmail(官网：http://www.foxmail.com/)：

b. 登录：

c. 测试：