Mail Server : Install Postfix2024/04/17 |
Install Postfix to configure SMTP Server.
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[1] | Install Postfix. |
root@mail:~ # pkg install -y postfix
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[2] | This example shows to configure SMTP-Auth to use Dovecot's SASL feature. |
root@mail:~ #
vi /usr/local/etc/postfix/main.cf # line 98 : uncomment and specify hostname myhostname = mail.srv.world # line 106 : uncomment and specify domain name mydomain = srv.world # line 122 : uncomment myorigin = $mydomain # line 136 : uncomment inet_interfaces = all # line 184 : uncomment mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain # line 227 : uncomment local_recipient_maps = unix:passwd.byname $alias_maps # line 272, 273 : uncomment and comment out mynetworks_style = subnet #mynetworks_style = host # line 286 : uncomment and specify your network mynetworks = 127.0.0.0/8, 10.0.0.0/24 # line 410 : uncomment alias_maps = hash:/etc/aliases # line 420 : uncomment alias_database = hash:/etc/aliases # line 442 : uncomment (use Maildir) home_mailbox = Maildir/ # line 578 : add smtpd_banner = $myhostname ESMTP # add follows to last line # disable SMTP VRFY command disable_vrfy_command = yes # require HELO command to sender hosts smtpd_helo_required = yes # limit an email size # example below means 10M bytes limit message_size_limit = 10240000 # SMTP-Auth settings smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous smtpd_sasl_local_domain = $myhostname smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination # disable sendmail root@mail:~ # sysrc sendmail_enable="NO"
root@mail:~ #
vi /etc/periodic.conf # create new daily_clean_hoststat_enable="NO" daily_status_mail_rejects_enable="NO" daily_status_include_submit_mailq="NO" daily_submit_queuerun="NO" install -d /usr/local/etc/mail root@mail:~ # install -m 0644 /usr/local/share/postfix/mailer.conf.postfix /usr/local/etc/mail/mailer.conf root@mail:~ # postalias /etc/aliases root@mail:~ # newaliases root@mail:~ # service postfix enable root@mail:~ # service postfix start |
[3] |
Configure additional settings for Postfix if you need.
However, you should consider to apply the settings,It's possible to reject many spam emails with the settings below. because sometimes normal emails are also rejected with them. Especially, there are SMTP servers that forward lookup and reverse lookup of their hostnames on DNS do not match even if they are not spammers. |
root@mail:~ #
vi /usr/local/etc/postfix/main.cf # add to last line # reject unknown clients that forward lookup and reverse lookup of their hostnames on DNS do not match smtpd_client_restrictions = permit_mynetworks, reject_unknown_client_hostname, permit # rejects senders that domain name set in FROM are not registered in DNS or # not registered with FQDN smtpd_sender_restrictions = permit_mynetworks, reject_unknown_sender_domain, reject_non_fqdn_sender # reject hosts that domain name set in FROM are not registered in DNS or # not registered with FQDN when your SMTP server receives HELO command smtpd_helo_restrictions = permit_mynetworks, reject_unknown_hostname, reject_non_fqdn_hostname, reject_invalid_hostname, permit service postfix reload |
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