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postfix 나 dovecot 은 매번 설치 할 때마다 애먹습니다 -.-;
버전이 올라가고 그러면서 조금씩 설정들이 변경이 되고 그러네요...
그래서 설치하는 글을 몇개 올려놓습니다. 짜깁기 해야 될겁니다... 이렇게 저렇게 해 보세요...
언제 한번 정리는 해 놔야 저도 매번 설치할 때마다 애먹지 않는데 귀찮아서리... ^^;
여기 게시판에서 "postfix", "dovecot" 검색하시면 설치 글이 몇개 될 겁니다.
Install Postfix to configure SMTP Server. SMTP uses [25/TCP].
[1]
This example shows to configure SMTP-Auth to use Dovecot's SASL function.
root@mail:~#
apt -y install postfix sasl2-bin
# on this example, proceed to select [No Configuration]
# because configure all manually
+------+ Postfix Configuration +-------+
| General type of mail configuration: |
| |
| No configuration |
| Internet Site |
| Internet with smarthost |
| Satellite system |
| Local only |
| |
| |
| <Ok> <Cancel> |
| |
+--------------------------------------+
# line 78 : uncomment
mail_owner = postfix
# line 94 : uncomment and specify hostname
myhostname = mail.srv.world# line 102 : uncomment and specify domainname
mydomain = srv.world# line 123 : uncomment
myorigin = $mydomain
# line 137 : uncomment
inet_interfaces = all
# line 185 : uncomment
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
# line 228 : uncomment
local_recipient_maps = unix:passwd.byname $alias_maps
# line 270 : uncomment
mynetworks_style = subnet
# line 287 : add your local network
mynetworks = 127.0.0.0/8, 10.0.0.0/24# line 407 : uncomment
alias_maps = hash:/etc/aliases
# line 418 : uncomment
alias_database = hash:/etc/aliases
# line 440 : uncomment
home_mailbox = Maildir/
# line 576: comment out and add#smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_banner = $myhostname ESMTP# line 650 : add
sendmail_path = /usr/sbin/postfix# line 655 : add
newaliases_path = /usr/bin/newaliases# line 660 : add
mailq_path = /usr/bin/mailq# line 666 : add
setgid_group = postdrop# line 670 : add#html_directory =
# line 674 : comment out#manpage_directory =
# line 679 : comment out#sample_directory =
# line 683 : comment out#readme_directory =
# line 684 : if also listen IPv6, change to [all]
inet_protocols = ipv4
# add follows to the end
# 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_auth_destination, permit_sasl_authenticated, reject
root@mail:~#
newaliases
root@mail:~#
systemctl restart postfix
[2]
Configure additional settings for Postfix if you need.
It's possible to reject many spam emails with the settings below.
However, you should consider to apply the settings,
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 /etc/postfix/main.cf
# add to the end
# 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
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