Hi All,<\/p>\n
Today we are going to see about how to configure simple POSTFIX mail server on Cent OS.<\/p>\n
Login to your server and run the following command to update the repository and packages available in your system.<\/p>\n
yum -y update<\/code><\/pre>\nNow update the hostname of your system to the FQDN you want to use with your mail server. Run the following command to change your hostname.<\/p>\n
hostname<\/span> mail.yourdomain.com<\/code><\/pre>\nNow add the hostname entry in the host files of your system. Edit\u00a0\/etc\/hosts<\/code>\u00a0files using your favorite editor. For example if your are using\u00a0nano<\/code>\u00a0then you will need to run the following command.<\/p>\nnano<\/span> \/etc\/hosts<\/code><\/pre>\nYou will see two lines of entries in there, append your server IP address followed by hostname at the end of the file. It should look like the one shown below.<\/p>\n
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4\r\n::1 localhost localhost.localdomain localhost6 localhost6.localdomain6\r\n104.36.18.239 mail.yourdomain.com<\/code><\/pre>\nNow we can install Postfix, enter the following command to do so.<\/p>\n
yum -y install<\/span> postfix<\/code><\/pre>\nBefore configuring postfix we will need to configure SSL which will be used to encrypt and secure the emails.<\/p>\n
mkdir<\/span> \/etc\/postfix\/ssl\r\ncd<\/span> \/etc\/postfix\/ssl<\/code><\/pre>\nNow we will have to create SSL certificates. If you do not have\u00a0openssl<\/code>\u00a0installed you can install it using the following command.<\/p>\nyum -y install<\/span> openssl<\/code><\/pre>\nNow run the following command to create certificate and key files.<\/p>\n
openssl req -x509 -nodes -newkey rsa:2048 -keyout server.key -out server.crt -nodes -days 365<\/code><\/pre>\nAfter that you have to generate CSR by providing some information and This will generate the key file and certificates and will save then in\u00a0\/etc\/postfix\/ssl<\/code>\u00a0directory.<\/p>\nNow edit postfix configuration file which can be found at\u00a0\/etc\/postfix\/main.cf<\/code>, with your favorite editor.<\/p>\nvi<\/span> \/etc\/postfix\/main.cf<\/code><\/pre>\nand append these lines at the end of the file.<\/p>\n
myhostname =<\/span> mail.yourdomain.com\r\nmydomain =<\/span> yourdomain.com\r\nmyorigin =<\/span> $mydomain<\/span>\r\nhome_mailbox =<\/span> mail\/\r\nmynetworks =<\/span> 127.0.0.0\/8\r\ninet_interfaces =<\/span> all\r\ninet_protocols =<\/span> all\r\ninet_interfaces =<\/span> localhost\r\nmydestination =<\/span> $myhostname<\/span>, localhost.$mydomain<\/span>, localhost, $mydomain<\/span>\r\nsmtpd_sasl_type =<\/span> dovecot\r\nsmtpd_sasl_path =<\/span> private\/auth\r\nsmtpd_sasl_local_domain =<\/span>\r\nsmtpd_sasl_security_options =<\/span> noanonymous\r\nbroken_sasl_auth_clients =<\/span> yes<\/span>\r\nsmtpd_sasl_auth_enable =<\/span> yes<\/span>\r\nsmtpd_recipient_restrictions =<\/span> permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination\r\nsmtp_tls_security_level =<\/span> may\r\nsmtpd_tls_security_level =<\/span> may\r\nsmtp_tls_note_starttls_offer =<\/span> yes<\/span>\r\nsmtpd_tls_loglevel =<\/span> 1\r\nsmtpd_tls_key_file =<\/span> \/etc\/postfix\/ssl\/server.key\r\nsmtpd_tls_cert_file =<\/span> \/etc\/postfix\/ssl\/server.crt\r\nsmtpd_tls_received_header =<\/span> yes<\/span>\r\nsmtpd_tls_session_cache_timeout =<\/span> 3600s\r\ntls_random_source =<\/span> dev:\/dev\/urandom\r\n<\/code><\/pre>\nNow open another configuration file\u00a0\/etc\/postfix\/master.cf<\/code><\/p>\n nano<\/span> \/etc\/postfix\/master.cf<\/code><\/pre>\nand find the following lines in the configuration file.<\/p>\n
# service type private unpriv chroot wakeup maxproc command + args<\/span>\r\n # (yes) (yes) (yes) (never) (100)<\/span>\r\n # ==========================================================================<\/span>\r\n smtp inet n - n - - smtpd\r\n<\/code><\/pre>\nNow add the following lines at just below these lines.<\/p>\n
submission inet n - n - - smtpd\r\n -o syslog_name=<\/span>postfix\/submission\r\n -o smtpd_sasl_auth_enable=<\/span>yes\r\n -o smtpd_recipient_restrictions=<\/span>permit_sasl_authenticated,reject\r\n -o milter_macro_daemon_name=<\/span>ORIGINATING\r\n smtps inet n - n - - smtpd\r\n -o syslog_name=<\/span>postfix\/smtps\r\n -o smtpd_sasl_auth_enable=<\/span>yes\r\n -o smtpd_recipient_restrictions=<\/span>permit_sasl_authenticated,reject\r\n -o milter_macro_daemon_name=<\/span>ORIGINATING<\/code><\/pre>\nNow You have successfully installed and configured POSTFIX in your linux machine.<\/p>\n
Next we will how to install dovecot on our upcoming tutorial. Thanks for reading our tutorial \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"
Hi All, Today we are going to see about how to configure simple POSTFIX mail server on Cent OS. Installing<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[2,4],"tags":[],"class_list":["post-396","post","type-post","status-publish","format-standard","hentry","category-linux","category-vps"],"_links":{"self":[{"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/posts\/396","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/comments?post=396"}],"version-history":[{"count":10,"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/posts\/396\/revisions"}],"predecessor-version":[{"id":433,"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/posts\/396\/revisions\/433"}],"wp:attachment":[{"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/media?parent=396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/categories?post=396"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxresellerwebhosting.in\/blog\/wp-json\/wp\/v2\/tags?post=396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}