转载原文地址：https://blog.csdn.net/wh211212/article/details/53040620
改天装系统搭建一下
一、Postfix简介
- Postfix 是一种电子邮件服务器，它是由任职于IBM华生研究中心（T.J. Watson Research Center）的荷兰籍研究员Wietse Venema为了改良sendmail邮件服务器而产生的。最早在1990年代晚期出现，是一个开放源代码的软件。
- Postfix 官方网站：http://www.postfix.org/
- Postfix 下载地址：http://www.postfix.org/download.html
二、Postfix安装
- 安装Postfix以配置SMTP服务器
[1] 即使CentOS系统安装了[最小安装]，也会安装Postfix，但如果Postfix不安装，请先安装它，如下所示。
[root@linuxprobe ~]# yum -y install postfix
[2] 此示例显示配置SMTP-Auth以使用Dovecot的SASL函数。
1 [root@linuxprobe ~]# vi /etc/postfix/main.cf 2 # line 75: uncomment and specify hostname 3 4 myhostname = linuxprobe.srv.world 5 # line 83: uncomment and specify domain name 6 7 mydomain = srv.world 8 # line 99: uncomment 9 10 myorigin = $mydomain 11 # line 116: change 12 13 inet_interfaces = all 14 # line 164: add 15 16 mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain 17 # line 264: uncomment and specify your local network 18 19 mynetworks = 127.0.0.0/8, 10.0.0.0/24 20 # line 419: uncomment (use mailboxdir) 21 22 home_mailbox = mailbox/ 23 # line 574: add 24 25 smtpd_banner = $myhostname ESMTP 26 # add follows to the end 27 28 # limit an email size for 10M 29 30 message_size_limit = 10485760 31 32 # limit a mailbox for 1G 33 34 mailbox_size_limit = 1073741824 35 # for SMTP-Auth 36 37 smtpd_sasl_type = dovecot 38 smtpd_sasl_path = private/auth 39 smtpd_sasl_auth_enable = yes 40 smtpd_sasl_security_options = noanonymous 41 smtpd_sasl_local_domain = $myhostname 42 smtpd_recipient_restrictions = permit_mynetworks,permit_auth_destination,permit_sasl_authenticated,reject 43 44 [root@linuxprobe ~]# systemctl restart postfix 45 [root@linuxprobe ~]# systemctl enable postfix
[3] 如果Firewalld正在运行，请允许SMTP服务。 SMTP使用25 / TCP。
1 [root@dlp ~]# firewall-cmd --add-service=smtp --permanent 2 success 3 [root@dlp ~]# firewall-cmd --reload 4 success
三、Dovecot 安装
- 安装Dovecot以配置POP / IMAP服务器
[1] 安装Dovecot.
1 [root@linuxprobe ~]# yum -y install dovecot
[2] 此示例显示配置为向Postfix提供SASL功能 .
1 [root@linuxprobe ~]# vi /etc/dovecot/dovecot.conf 2 # line 24: uncomment 3 protocols = imap pop3 lmtp 4 # line 30: uncomment and change ( if not use IPv6 ) 5 listen = * 6 [root@linuxprobe ~]# vi /etc/dovecot/conf.d/10-auth.conf 7 # line 10: uncomment and change ( allow plain text auth ) 8 disable_plaintext_auth = no 9 # line 100: add 10 auth_mechanisms = plain login 11 [root@linuxprobe ~]# vi /etc/dovecot/conf.d/10-mail.conf 12 # line 30: uncomment and add 13 mail_location = maildir:~/Maildir 14 [root@linuxprobe ~]# vi /etc/dovecot/conf.d/10-master.conf 15 # line 96-98: uncomment and add like follows 16 # Postfix smtp-auth 17 unix_listener /var/spool/postfix/private/auth { 18 mode = 0666 19 user = postfix 20 group = postfix 21 } 22 [root@linuxprobe ~]# vi /etc/dovecot/conf.d/10-ssl.conf 23 # line 8: change (not require SSL) 24 ssl = no 25 26 [root@linuxprobe ~]# systemctl start dovecot 27 [root@linuxprobe ~]# systemctl enable dovecot
[3] 如果Firewalld正在运行，请允许POP / IMAP服务。 POP使用110 / TCP，IMAP使用143 / TCP.
1 [root@vdevops ~]# firewall-cmd --add-port={110/tcp,143/tcp} --permanent 2 success 3 [root@vdevops ~]# firewall-cmd --reload 4 success
四、SSL设置
- 配置SSL以加密连接
[1] 首先创建证书，传送门：http://blog.csdn.net/wh211212/article/details/52982917
[2] 为SSL配置Postfix和Dovecot。
1 # add to the end 2 smtpd_use_tls = yes 3 smtpd_tls_cert_file = /etc/pki/tls/certs/server.crt 4 smtpd_tls_key_file = /etc/pki/tls/certs/server.key 5 smtpd_tls_session_cache_database = btree:/etc/postfix/smtpd_scache 6 [root@linuxprobe ~]# vi /etc/postfix/master.cf 7 # line 26-28: uncomment 8 smtps inet n - n - - smtpd 9 -o syslog_name=postfix/smtps 10 -o smtpd_tls_wrappermode=yes 11 [root@linuxprobe ~]# vi /etc/dovecot/conf.d/10-ssl.conf 12 # line 8: change 13 ssl = yes 14 # line 14,15: specify certificates 15 ssl_cert = </etc/pki/tls/certs/server.crt 16 ssl_key = </etc/pki/tls/certs/server.key 17 [root@linuxprobe ~]# systemctl restart postfix dovecot
[3] 如果Firewalld正在运行，请允许SMTPS / POP3S / IMAPS服务。 SMTPS使用465 / TCP，POP3S使用995 / TCP，IMAPS使用993 / TCP。
1 [root@vdevops ~]# firewall-cmd --add-service={pop3s,imaps} --permanent 2 success 3 [root@vdevops ~]# firewall-cmd --add-port=465/tcp --permanent 4 success 5 [root@vdevops ~]# firewall-cmd --reload 6 success
邮件日志报告：pflogsumm
- 安装pflogsumm这是Postfix日志报告工具
[1] 安装postfix-perl-scripts包。
1 [root@linuxprobe ~]# yum -y install postfix-perl-scripts 2 # generate log summary for yesterday 3 [root@linuxprobe ~]# perl /usr/sbin/pflogsumm -d yesterday /var/log/maillog 4 Postfix log summaries for Jul 14 5 Grand Totals 6 ------------ 7 messages 8 2 received 9 5 delivered 10 0 forwarded 11 0 deferred 12 0 bounced 13 0 rejected (0%) 14 0 reject warnings 15 0 held 16 0 discarded (0%) 17 18 2879 bytes received 19 6572 bytes delivered 20 1 senders 21 1 sending hosts/domains 22 2 recipients 23 2 recipient hosts/domains 24 Per-Hour Traffic Summary 25 ------------------------ 26 time received delivered deferred bounced rejected 27 -------------------------------------------------------------------- 28 0000-0100 0 0 0 0 0 29 0100-0200 0 0 0 0 0 30 0200-0300 0 0 0 0 0 31 0300-0400 0 0 0 0 0 32 0400-0500 0 0 0 0 0 33 0500-0600 0 0 0 0 0 34 0600-0700 0 0 0 0 0 35 0700-0800 0 0 0 0 0 36 0800-0900 0 0 0 0 0 37 0900-1000 0 0 0 0 0 38 1000-1100 2 5 0 0 0 39 1100-1200 0 0 0 0 0 40 1200-1300 0 0 0 0 0 41 1300-1400 0 0 0 0 0 42 1400-1500 0 0 0 0 0 43 1500-1600 0 0 0 0 0 44 1600-1700 0 0 0 0 0 45 1700-1800 0 0 0 0 0 46 1800-1900 0 0 0 0 0 47 1900-2000 0 0 0 0 0 48 2000-2100 0 0 0 0 0 49 2100-2200 0 0 0 0 0 50 2200-2300 0 0 0 0 0 51 2300-2400 0 0 0 0 0 52 53 Host/Domain Summary: Message Delivery 54 -------------------------------------- 55 sent cnt bytes defers avg dly max dly host/domain 56 -------- ------- ------- ------- ------- ----------- 57 3 4119 0 0.4 s 0.8 s srv.world 58 2 2453 0 0.1 s 0.1 s mail.srv.world 59 60 Host/Domain Summary: Messages Received 61 --------------------------------------- 62 msg cnt bytes host/domain 63 -------- ------- ----------- 64 2 2879 mail.srv.world 65 66 Senders by message count 67 ------------------------ 68 2 cent@mail.srv.world 69 70 Recipients by message count 71 --------------------------- 72 3 redhat@srv.world 73 2 cent@mail.srv.world 74 75 Senders by message size 76 ----------------------- 77 2879 cent@mail.srv.world 78 79 Recipients by message size 80 -------------------------- 81 4119 redhat@srv.world 82 2453 cent@mail.srv.world 83 84 message deferral detail: none 85 message bounce detail (by relay): none 86 message reject detail: none 87 message reject warning detail: none 88 message hold detail: none 89 message discard detail: none 90 smtp delivery failures: none 91 Warnings 92 -------- 93 tlsmgr (total: 6) 94 3 redirecting the request to postfix-owned data_directory /var/li... 95 3 request to update table btree:/etc/postfix/smtpd_scache in non-... 96 97 Fatal Errors: none 98 Panics: none 99 Master daemon messages 100 ---------------------- 101 4 daemon started -- version 2.10.1, configuration /etc/postfix 102 3 terminating on signal 15 103 1 reload -- version 2.10.1, configuration /etc/postfix 104 105 [root@linuxprobe ~]# crontab -e 106 # 发送邮件日志摘要在AM每天1:00到根 107 00 01 * * * perl /usr/sbin/pflogsumm -e -d yesterday /var/log/maillog | mail -s 'Logwatch for Postfix' root