sendmail做smtp SERVER

sendmail所需包只需两个
[root@localhost etc]# rpm -qa | grep sendmail
sendmail-cf-8.13.4-2
sendmail-8.13.4-2

  
    安装sendmail做smtp SERVER

•     步骤一。Sendmail前先做DNS 配置

定义主域名

[root@localhost etc]# cat /etc/named.conf zone "macg.com" IN {         type master;         file "macg.zone";         allow-update { none; }; };

定义alias

[root@localhost mail]# vi /var/named/macg.zone $TTL    86400 @               IN SOA  @       root (                                         42              ; serial (d. adams)                                         3H              ; refresh                                         15M             ; retry                                         1W              ; expiry                                         1D ); @ IN NS         192.168.1.12;   IN A          192.168.1.12; www IN A 192.168.1.12; test IN A 192.168.1.12; ftp IN A 192.168.1.12;    pop3 IN A 192.168.1.12; smtp IN A 192.168.1.12

•     步骤二。sendmail.cf修改

使本地和异地foxmail都能发mail 必须改成实际域名，否则虽然 linux本地能发mail，但一些客户端（如foxmail）无法通过sendmail发mail C{w}localhost localdomain 改成 C{w}localhost    macg.com  smtp.macg.com                      主域名      email（smtp）服务器域名

# SMTP client options #O ClientPortOptions=Family=inet, Address=0.0.0.0 client address不必改，就保持缺省的#

# SMTP daemon options O DaemonPortOptions=Port=smtp,Addr=0.0.0.0, Name=MTA     Addr只能是0.0.0.0

•     步骤三。linux smtp服务启动

[root@localhost mail]# /etc/init.d/sendmail restart Shutting down sendmail: [  OK  ] Shutting down sm-client: [  OK  ] Starting sendmail: [  OK  ] Starting sm-client: [  OK  ]   sendmail daemon启动同时也启动了client

•    步骤四。email客户端PC配置

1. PC  DNS指向上面的DNS SERVER

2. pop3 帐户就是unix 普通用户 pop3 account:mac pop3 password:xxxxxx

3. foxmail 建立帐户 帐户mac@macg.com SMTP SERVER :smtp.macg.com POP3 SERVER :pop3.macg.com

     /etc/mail/access不必做任何修改

[root@localhost mail]# vi access localhost.localdomain           RELAY localhost                       RELAY 127.0.0.1                       RELAY macg.com                        RELAY smtp.macg.com                   RELAY 192.168.1          RELAY

删掉了192.168.1          RELAY FOXMAIL仍能发mail 本机也能发mail给本机帐户

删掉macg.com                        RELAY 删掉smtp.macg.com                   RELAY FOXMAIL仍能发mail 本机也能发mail给本机帐户

总之，/etc/mail/access不必做任何修改
注意修/etc/mail/改access,完后都要做两步:
[root@localhost mail]# makemap hash /etc/mail/access.db < /etc/mail/access
[root@localhost mail]# /etc/init.d/sendmail restart

    local-host-names不必做任何修改

[root@localhost mail]# cat local-host-names # local-host-names - include all aliases for your machine here.

FOXMAIL仍能发mail 本机也能发mail给本机帐户

    sendmail.cf是sendmail的主配置文件
    早期sendmail.cf是放在/etc下
            RH9是放在/etc/mail下
    在src/sendmail.8.9.3/cf目录下还有许多适应各种系统的sendmail.cf的文件样本


    两种sendmail.cf配置方法

•  直接修改 /etc/mail/sendmail.cf文件来配置sendmail的

•  mc生成法：配置sendmail.mc文件，生成sendmail.cf

只是在做身份验证的时候才使用sendmail.mc文件

vi /etc/mail/sendmial.mc

m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

    sendmail.cf 下的DaemonPortOptions=Port=smtp,Addr的设法

# SMTP daemon options O DaemonPortOptions=Port=smtp,Addr=127.0.0.1, Name=MTA    此时可以在本地给本机发mail 但在其他PC无法用foxmail通过 sendmail发邮件

# SMTP daemon options O DaemonPortOptions=Port=smtp,Addr=192.168.1.12, Name=MTA 此时linux本地无法通过mail指令发mail给本机用户 但可以在其他PC用foxmail 通过sendmail 发邮件

# SMTP daemon options O DaemonPortOptions=Port=smtp,Addr=0.0.0.0, Name=MTA    最佳办法 既可以在本地给本机发mail 也可以在PC用foxmail发

    mail troubleshooting

• 能发信不能收信

    sendmail 通，pop3（dovecot)没通

• 能本地发信给本地帐户，但不能通过异地客户端（foxmail）发信的 

  sendmail.cf中 option address 设成127.0.0.1了，改成0.0.0.0

• 能通过异地客户端（foxmail）发信的，而不能本地发信给本地帐户   

  sendmail.cf中 option address 设成具体地址了，改成0.0.0.0

• 也可能出现foxmail可以发信给SERVER的另一个帐户，实际仍属于server本地发信，但无法发信给一个mail server的帐户  

 foxmail 的smtp server 要设“authentication "---"use same account and password as pop3"


   其他 配置文件

[root@localhost macg]# ls /etc/mail access     domaintable     helpfile          mailertable     Makefile     sendmail.mc   submit.cf  trusted-users  virtusertable.db access.db  domaintable.db  local-host-names  mailertable.db  sendmail.cf  spamassassin  submit.mc  virtusertable

[root@localhost mail]# cat  local-host-names # local-host-names - include all aliases for your machine here

[root@localhost mail]# cat trusted-users # trusted-users - users that can send mail as others without a warning # apache, mailman, majordomo, uucp, are good candidates

[root@localhost mail]# cat access # Check the /usr/share/doc/sendmail/README.cf file for a description # of the format of this file. (search for access_db in that file) # The /usr/share/doc/sendmail/README.cf is part of the sendmail-doc # package. # # by default we allow relaying from localhost... localhost.localdomain           RELAY localhost                       RELAY 127.0.0.1                       RELAY 192.168.1                    RELAY

      sendmail log在哪里看？

[root@localhost mail]# cat /var/log/maillog May  7 18:01:55 localhost pop3-login: Login: macg [::ffff:192.168.1.11] May  7 18:05:08 localhost sendmail[6566]: l47A48Iq006566: from=<macg@192.168.1.12>, size=328, class=0, nrcpts=1, msgid=<200705071005.l47A48Iq006566@localhost.localdomain>, proto=SMTP, daemon=MTA, relay=[192.168.1.11] May  7 18:05:08 localhost sendmail[6566]: l47A48Iq006566: to=<macg@192.168.1.12>, delay=00:00:00, mailer=esmtp, pri=30328, dsn=4.4.3, stat=queued