Sendmail dovecot mail server

Sendmail Application

experiment ： Realization 163.com Users in the domain and sina.com.cn Users in this domain can send e-mails to

Topology

stay 163.com Set up mail in this domain The server mail.163.com

sendmail-8.13.8-2.el5.i386.rpmsendmail-devel-8.13.8-2.el5.i386.rpm

sendmail-cf-8.13.8-2.el5.i386.rpmsendmail-doc-8.13.8-2.el5.i386.rpm

stay /etc/mail/ A corresponding file is formed under the directory

Sendmail.mc file

because sendmail The configuration file for is quite complex , By modifying this file , restart sendmail It will be updated dynamically sendmail Configuration file for , Achieve the effect of modifying the configuration file .

hold sendmail The listening address of is changed to 0.0.0.0 explain sendmail Can listen to any address

access File is defined to allow sendmail Send relay messages to which clients

Create two users user1、user2

Enter into /var/mail/ View the user's mailbox under the directory

Install receive mail The server

dovecot-1.0.7-7.el5.i386.rpm

Receiving mail The server The application layer service agreements provided are imap4imapspop3pops,imappop3 Is based on tcp Transmission of plaintext ,imaps and pops Is based on tcp Authentication protocol ,imap4 The port of is 143,imaps The port of is 993,pop3 The port is 110,pops The port of is 995.

Windows The mail client software of the system is outlook, open outlook,user1 use outlook Send yourself an email , Then receive the mail .

Check email The server Log

Oct1102:39:30localhostsendmail[13294]:r9B9dUhm013294:from=<[email protected]>,size=414,,nrcpts=1,msgid=<[email protected]>,proto=SMTP,daemon=MTA,relay=[192.168.20.101]

Oct1102:39:30localhostsendmail[13295]:r9B9dUhm013294:to=<[email protected]>,ctladdr=<[email protected]>(501/501),delay=00:00:00,xdelay=00:00:00,mailer=local,pri=30582,dsn=2.0.0,stat=Sent

see user1 Received mail

stay sina.com.cn Build in domain mail.sina.com.cn Mail server

install sendmail and dovecot

open accecss file

install dns The server , Do domain name resolution for the mail server

Sendmail.mc file

because sendmail The configuration file for is quite complex , By modifying this file , restart sendmail It will be updated dynamically sendmail Configuration file for , Achieve the effect of modifying the configuration file .

hold sendmail The listening address of is changed to 0.0.0.0 explain sendmail Can listen to any address

Useradduser3

stay windows The system's own mail client software outlook,user3 Send and receive e-mails for yourself ,sina.com.cn Can mail servers in this domain send and receive mail .

Observe that the log is sent successfully

Oct1202:01:07localhostsendmail[17883]:r9C9172E017883:from=<[email protected]>,size=437,,nrcpts=1,msgid=<[email protected]>,proto=SMTP,daemon=MTA,relay=[192.168.20.202]

Oct1202:01:07localhostsendmail[17898]:r9C9172E017883:to=<[email protected]>,ctladdr=<use[email protected]>(502/503),delay=00:00:00,xdelay=00:00:00,mailer=local,pri=30618,dsn=2.0.0,stat=Sent

Oct1202:01:21localhostdovecot:pop3-login:Login:user=<user3>,method=PLAIN,rip=::ffff:192.168.20.202,lip=::ffff:192.168.20.2

use 163.com Mailbox users in this domain user1 to sina.com.cn Mailbox users in this domain user3 Send E-mail , The email title is ：ok, The content is ：hellouser3.

Check the log ：

ct1202:45:06mailsendmail[11344]:r9C9T9Fg011344:[email protected],size=23,,nrcpts=1,msgid=<[email protected]>,proto=SMTP,daemon=MTA,relay=[192.168.20.100]

Oct1202:45:06mailsendmail[11344]:r9C9T9Fg011344:[email protected],delay=00:06:35,mailer=esmtp,pri=30023,dsn=4.4.3,stat=queued