Linux and cloud Computing-phase nineth: Mail e-mail server Setup-Configure SSL-based mail servers and use of virtual domains

Linux and Cloud computing--the second phase of Linux Server Setup The nineth Chapter:Mail e-mail server Setup-Configure SSL-based mail servers and the use of virtual domains Mail Client Configuration

can be self Select the email client to set according to the configuration of the server. It is recommended to use client software such as Foxmail or Outlook .

Configure SSL

Configuration SSL come to Encrypted Connection . SMTPS using port 465/tcp, pop3s using port 995/tcp, IMAPS using port 993/tcp.

[1] Create a certificate [2] Give Postfix and the Dovecot Configuration SSL.

[Email protected] ~]# VI/ETC/POSTFIX/MAIN.CF

# at the end of the add following content

Smtpd_use_tls = yes

Smtpd_tls_cert_file =/etc/pki/tls/certs/server.crt

Smtpd_tls_key_file =/etc/pki/tls/certs/server.key

Smtpd_tls_session_cache_database = Btree:/etc/postfix/smtpd_scache

[Email protected] ~]# VI/ETC/POSTFIX/MASTER.CF

# line 26-28: Cancel Comment

Smtps inet n-n--SMTPD

-O Syslog_name=postfix/smtps

-O Smtpd_tls_wrappermode=yes

[Email protected] ~]# vi/etc/dovecot/conf.d/10-ssl.conf

# line 8: Modify

SSL = yes

# line 14,15: Specify certificate File

Ssl_cert = </etc/pki/tls/certs/server.crt

Ssl_key = </etc/pki/tls/certs/server.key

[Email protected] ~]# systemctl restart Postfix

[Email protected] ~]# systemctl restart Dovecot

[3] within the client Select SMTP and IMAP use TLS/SSL Virtual Domain

Configuration Postfix come to use a virtual domain to send a message with a different name from your Origin domain.

For example,

present domain name example.com

New domain name Virtual.host

a user [Jeffrey] have a email address [[email protected]],

a users [Redhat] have a an email address [[email protected]],

User [Redhat] also use the same name for before [@] with [Jeffrey].

[1] Configure virtual Domain

[Email protected] ~]# VI/ETC/POSTFIX/MAIN.CF

# in the Add the following section at the end of the file

Virtual_alias_domains = Virtual.host

Virtual_alias_maps = hash:/etc/postfix/virtual

[Email protected] ~]# vi/etc/postfix/virtual

# in the file Add the following above

[Email protected] Redhat

[Email protected] ~]# postmap/etc/postfix/virtual

[Email protected] ~]# Systemctl reload Postfix

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Linux and cloud Computing-phase nineth: Mail e-mail server Setup-Configure SSL-based mail servers and use of virtual domains