Virtual User Mail Transfer

SMTP Virtual user mail transfer and management

I. Local administration of Simple Mail transfer

1). How this machine denies other designated IP hosts to send mail remotely

Server configuration: (The restriction rules are in the order of the query, the first rule that meets the criteria is executed)

Vim/etc/postfix/access

(IP) 172.25.254.***REJECT

Postmap/etc/postfix/access

Postconf-e "Smtpd_client_restrictions =check_client_access hash:/etc/postfix/access"

Systemctl Restart Postfix.service

Test remote Send mail

Telnet IP

Mail From:[email protected]

RCPT To:[email protected]

If a message is sent remotely, the client's IP address matches the IP in Access and denies the client's connection request)

2). How to deny other users remote access to send mail

Vim/etc/postfix/sender

[Email protected] REJECT(Note: Remote access is a domain-wide deny)

Postmap/etc/postfix/sender

Postconf-e "smtpd_sender_restrictions = check_sender_access Hash:/etc/postfix/sender"

Systemctl Restart Postfix.service

3). How to specify that users cannot receive remote Mail

Vim/etc/postfix/recip

[Email protected] REJECT

Postmap Recip

Postconf-e "Smtpd_recipient_restrictions =check_recipient_access Hash:/etc/postfix/recip"

Systemctl Restart Postfix.service

Two. Receipt of Simple Mail (remote receive (DOVECOT) management)

1) Yum Install Dovecot-y

View the interface for the message types supported by the Dovecot (Dovecot can open four ports)

IMAP143cat/etc/services | grep IMAP

Popcat/etc/services | grep imaps

Imaps993cat/etc/services | grep POP3

Pop3s995cat/etc/services | grep pop3s

2) vim/etc/dovecot/dovecot.conf

24| protocols = IMAP POP3 LMTP*/Postal Transport protocol LMTP is local transfer

48| Login_trusted_networks = 0.0.0.0/0

49| Disable_plaintext_auth = no/* Allow plaintext password authentication

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

Mail_location = mbox:~/mail:inbox=/var/mail/%u/* Local mail location

Systemctl Start Dovecot

Netstat-antlpe | grep dovecot/* View Dovecot Ports

Yum Install Mutt-y

>/var/log/maillog

Tail-f/var/log/maillog/* Email error message

Mutt-f Pop://[email protected]

Direct Access will be an error, there is no/home/westos/mail/.imap this directory

Su-westos

CD Mail

Ls-a

mkdir. IMAP

Touch/home/westos/mail/.imap/inbox

If you want to set up the above directories automatically, you need to establish mkdir-p under/etc/skel mail/.imap

Touch/etc/skel/mail/.imap/inbox

3). Install software management Dovecot, Thunderbird software (there are two ways to install Thunderbird, one is to write a script, step-by-step installation, and the other is to create a third-party yum Source

)

1) Create a script

#!/bin/bash

Yum Whatprovide */$1

./thunderbird (performing Thunderbird can view missing plugins) Execute scripts to look for software that needs to be installed to solve Thunderbird dependencies

Three. Create a virtual user and database association for Simple Mail

1) First make PHP software management mariadb

Yum Install Mariadb-y

Yum Install Mariadb-server-y

Yum intsall php php-mysql-y/*php is a scripting language embedded in HTML and interpreted by the server

Tar jxf phpmyadmin-3.4.0-all-languages.tar.bz2-c/var/www/html

Yum Install Phpmyadmin-3.4.0-all-languages-y

CP config.sample.inc.php config.inc.php

Vim config.inc.php

$cfg [' blowfish_secret '] = ' westos ';

Systemctl Restart httpd/* Note: If you do not restart properly, modify the contents of the hosts, plus local DNS and domain names

2) Install the database to make the following settings

Mysql-uroot-pwestos

SELECT * from Email.muser;

Create user [email protected] identified by ' postfix '

Grant Insert,upddate,select on email.* to [email protected];

Mysql-upostfix-ppostfix

SELECT * from Email.muser;

3) Edit the file name, user name, mail location

Cd/etc/postfix

Vim MYSQL-USERS.CF

hosts = localhost

user = Postfix

Password = postfix

dbname = Email

Table = Muser

Select_field = Username

Where_field = Username

Postmap-q "[email protected]" MYSQL:/ETC/POSTFIX/MYSQL-USERS.CF

Cp-p mysql-users.cf MYSQL-DOMAIN.CF

Modify the last two items

Select_field = Domain

Where_field = Domain

Postmap-q "linux.org" mysql:/etc/postfix/mysql-domain.cf

Cp-p mysql-users.cf MYSQL-MAILDIR.CF

Modify the last two items

Select_field = Maildir

Where_field = Username

Postmap-q "[email protected]" MYSQL:/ETC/POSTFIX/MYSQL-MAILDIR.CF

4) Set up account management virtual user

Useradd-u 666-g 666 vmail-s/sbin/nologin

Groupadd-g 666 Vmail

Postconf-e "virtual_gid_maps = static:666"

Postconf-e "virtual_uid_maps = static:666"

Postconf-e "virtual_mailbox_base =/home/vmail"

Postconf-e "virtual_alias_maps = mysql:/etc/postfix/mysql-users.cf"

Postconf-e "virtual_mailbox_domains = mysql:/etc/postfix/mysql-domain.cf"

Postconf-e "virtual_mailbox_maps = mysql:/etc/postfix/mysql-maildir.cf"

5) Associating virtual users with Postfix

cd/usr/share/doc/dovecot-2.2.10/

CD Example-config

CP Dovecot-sql.conf.ext/etc/dovecot

Vim/etc/dovecot/dovecot-sql.conf.ext

32|driver = MySQL

71|connect = host=localhost Dbname=email user=postfix password=postfix

78|default_pass_scheme = PLAIN

107|password_query = \

108| SELECT username, domain, password \

109| From Muser WHERE username = '%u ' and domain = '%d '

125|user_query = Select Maildir, 666 as UID, 666 as GID from Muser WHERE username = '%u '

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

30|mail_location = maildir:/home/vmail/%d/%n

168|first_valid_uid = 666

175|first_valid_gid = 666

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

122|! Include Auth-systemctl.conf.ext/* Real users can log in

123|! Include Auth-sql.conf.ext/* Allow virtual users to log in

Yum Install Dovecot-mysql.x86_64-y

Iv. empty Shell e-mail server

Vim/etc/named.rfc1912.zones

Znoe "Linux.org" in {

Type master;

File "Linux.org.zone"

allow-update {none;};

};

Vim/var/named/linux.org.zone

Linux.org. MX 1 172.25.254.150.

Rm-fr/etc/postfix/main.cf

Yum Reinstall postfix-y

Vim/etc/postfix/main.cf

75|myhostname = mail.mail.com

83|mydomain = mail.com

98|myorigin = linux.org

113|inet_interfaces = All

164|mydestination =

313|relayhost = 172.25.254.249

140|local_transport = error:local Delivery disabled

MyNetwork = 172.25.254.0/24

Testing on the core processing mail server: Cd/home/vmail

Watch-n 1 ls//production look for sent messages

Virtual User Mail Transfer