Webmail Mail Server SETUP-problem-Email sending, recipient cannot receive

# Setting up a webmail Mail Server #1. Disable sendmail installed by default in the system: [root @ red4 ~] # Service Sendmail stop Disable sendmail: [failure] [root @ red4 ~] # [Root @ red4 ~] # Chkconfig -- level 35 Sendmail off [root @ red4 ~] # [Root @ red4 ~] # Chkconfig -- list sendmailsendmail 0: Close 1: Close 2: Close 3: Close 4: Close 5: Close 6: Close [root @ red4 ~] #2. Install the mail service package [root @ red4 ~] # Yum list | grep postfixthis system is not registered with RHN. RHN support will be disabled. postfix. i386 2. 3.3-2.1.el5 _ 2 rhel5 postfix-pflogsumm.i386. 3.3-2.1.el5 _ 2 rhel5 [root @ red4 ~] # Yum install-y Postfix #3. modify the configuration file [root @ red4 ~] # Cd/etc/Postfix/[root @ red4 Postfix] # lsaccess generic main. cf master. cf post-install transportbounce. cf. default header_checks main. cf. default postfix-files relocated virtualcanonical license makedefs. out postfix-script tls_license [root @ red4 ~] # Vim main. cf 1 myhostname = mail.163.com 2 mydomain = 163.com 3 myorigin = $ mydomain 4 inet_interfaces = 192.168.101.104, 127.0.0.1 5 mydestination = $ myhostname, $ mydomain 6 home_mailbox = maildir/#4. start Service [root @ red4 Postfix] # service Postfix start Postfix: [OK] [root @ red4 Postfix] #5. view the Service's process name and listening port # Note: Here we are looking for <master> [root @ red4 Postfix] # netstat-utnap | grep mastertcp 0 0 192.168.101.104: 25 0.0.0.0: * Listen 13370/Master TCP 0 127.0.0.1: 25 0.0.0.0: * Listen 13370/Master [root @ red4 Postfix] #6. postfix uses the local system account as the email account <passwd = 111> [root @ red4 Postfix] # useradd userone [root @ red4 Postfix] # passwd useronechanging password for user userone. new Unix Password: Bad password: it is way too shortretype new Unix Password: passwd: All authentication tokens updated successfully. [root @ red4 Postfix] # useradd us Ertwo [root @ red4 Postfix] # passwd usertwochanging password for user usertwo. new Unix Password: Bad password: it is way too shortretype new Unix Password: passwd: All authentication tokens updated successfully. [root @ red4 Postfix] #7. install the software package that provides the email receiving service # Note: If a dependency error is prompted, install <mysql> and <Perl> [root @ red4 Postfix] # Yum list | grep dovecotthis system is not registered with RHN. RHN support will be disabled. dovecot. i386 1.0.7-7. EL5 rhel5 [root @ red4 Postfix] # Yum install-y Dovecot #8. modify the Dovecot configuration file [root @ red4 Postfix] # Cat/etc/Dovecot. conf | grep "mail_location = maildir :~ /Maildir "# mail_location = maildir :~ /Maildir [root @ red4 Postfix] # Cat/etc/Dovecot. conf | grep protocols # protocols = IMAP IMAPs POP3 pop3s [root @ red4 Postfix] #9. start service \ view port [root @ red4 Postfix] # service Dovecot start Dovecot IMAP: [OK] [root @ red4 Postfix] # netstat-utnap | grep dovecottcp 0 ::: 993: * Listen 13537/Dovecot TCP 0: 995: * Listen 13537/Dovecot TCP 0: 110 ::: * Listen 13537/Dovecot TCP 0: 143: * Listen 13537 /Dovecot [root @ red4 Postfix] #10. install the Web Client Program # Note: The PHP dependency may be prompted. You need to install <PHP-mbstring> [root @ red4 Postfix] # Yum list | grep squirrelmailthis system is not registered with RHN. RHN support will be disabled. squirrelmail. noarch 1.4.8-5. el5_4.10 rhel5 [root @ red4 Postfix] # Yum install-y squirrelmail #11. enable HTTPd service [root @ red4 Postfix] # service httpd restart stop httpd: [OK] Start httpd: [OK] [root @ red4 Postfix] # modify squirrel [Root @ red4 Postfix] # Vim/etc/squirrelmail/config. PHP #26 $ squirrelmail_default_language = 'zh _ cn'; #59 $ default_charset = 'utf-8'; #12. open the browser for testing # Note: After opening fails, check your DNS configuration to see if it is correct. # Use the created <userone> <usertwo> user to log on. login <root> the user logon does not know why? # Q2. can log on, use <userone> login, to send an email to <usertwo@mail.wing.com> # <usertwo> not receive, why? ######################################## ####### Mail System DNS configuration ############################# ################# 1. Modify the named. conf [root @ red4 etc] # PWD/var/named/chroot/etc [root @ red4 etc] # cat named. conf options {directory "/var/named" ;}; zone "wing.com" in {type master; file "wing.com. zone ";}; zone" 101.168.192.in-ADDR. ARPA. "In {type master; file" mail.com. ARPA ";};# 2. create wing.com. zone [root @ red4 named] # PWD/var/named/chroot/var/named [root @ red4 named] # Cat wing.com. zone $ TTL 7200wing.com. in SOA dns.wing.com. root.wing.com. (20130606 1 h 15 m 1 W 1D) in NS dns.wing.com.dns.wing.com. in a 192.168.101.20.mail.wing.com. in a 192.168.101.20.wing.com. in MX 10 mail.wing.com. #3. test [root @ red4 named] # host mail.wing.commail.wing.com has address 192.168.101.104 [root @ red4 named] # host login has address 192.168.101.104 [root @ red4 named] # [root @ red4 named] # host -t ptr 192.168.101.102.164.101.168.192.in-ADDR. ARPA Domain Name Pointer dns.wing.com. 104.101.168.192.in-ADDR. ARPA Domain Name Pointer mail.wing.com. [root @ red4 named] # [root @ red4 named] # NSLookup> set type = Mx> wing. comserver: 127.0.0.1address: 127.0.0.1 #53 wing.com mail exchanger = 10 mail.wing.com.> set type = PTR> 192.168.101.20.server: 127.0.0.1address: 127.0.0.1 #53 104.101.168.192.in-ADDR. ARPA name = mail.wing.com. 104.101.168.192.in-ADDR. ARPA name = dns.wing.com.> set type = A> mail. wing. comserver: 127.0.0.1address: 127.0.0.1 #53 name: mail. wing. comaddress: 192.168.101.104>