## Machine virtuelle MAIL
Cette machine est destinée à accueillir le serveur d'envoi, réception et consultation de courriel de l'association.
### Matériel virtuel
CPU : 2
RAM : 1000 Mio
Stockage de masse : 50 Gio
### Logiciel
Système d'exploitation : Debian GNU/Linux-libre 11 (Bullseye)
Noyau : Linux-libre LTS (`linux-libre-lts` des dépôts https://linux-libre.fsfla.org)
Sécurités de la maintenance : `etckeeper`, `mollyguard`, `git`, `tig`, `screen`
Serveur IMAP (et authentification) : `courier`
Mail Transfer Agent : `postfix`
Webmail : `roundcube` (**upstream**)
Serveur http : `nginx`
### Caractéristiques notables
Domaine : mail.a-lec.org
Adresse ipv4 publique : 80.67.176.33
Adresse ipv4 interne : 192.168.1.201
Adresse ipv6 publique : 2001:910:1021::201
### Configuration MTA
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
\# Debian specific: Specifying a file name will cause the first
\# line of that file to be used as the name. The Debian default
\# is /etc/mailname.
\#myorigin = /etc/mailname
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
\# appending .domain is the MUA's job.
append_dot_mydomain = no
\# Uncomment the next line to generate "delayed mail" warnings
\#delay_warning_time = 4h
readme_directory = no
\# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
\# fresh installs.
compatibility_level = 2
\# TLS parameters
smtpd_tls_cert_file=/etc/letsencrypt/live/mail.a-lec.org/fullchain.pem
smtpd_tls_key_file=/etc/letsencrypt/live/mail.a-lec.org/privkey.pem
smtpd_tls_security_level = may
smtpd_tls_auth_only = yes
smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3
smtpd_tls_protocols=!SSLv2,!SSLv3
smtpd_tls_loglevel = 1
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_cert_file=/etc/letsencrypt/live/mail.a-lec.org/fullchain.pem
smtp_tls_key_file=/etc/letsencrypt/live/mail.a-lec.org/privkey.pem
smtp_tls_security_level = may
smtp_tls_note_starttls_offer = yes
smtp_tls_mandatory_protocols=!SSLv2,!SSLv3
smtp_tls_protocols=!SSLv2,!SSLv3
smtp_tls_loglevel = 1
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
\# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
\# information on enabling SSL in the smtp client.
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sender_restrictions = reject_unknown_sender_domain
myhostname = mail.a-lec.org
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = $myhostname, a-lec.org, mail.a-lec.org, localhost, os-k.eu
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.169.1.0/24
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
home_mailbox = Maildir/
virtual_alias_maps = hash:/etc/postfix/virtual
mailbox_command =
\## DKIM
smtpd_milters = unix:var/run/opendkim/opendkim.sock
non_smtpd_milters = unix:var/run/opendkim/opendkim.sock
\## Ralentissement pour les serveurs problématiques
transport_maps = hash:/etc/postfix/transport
slow_destination_concurrency_limit = 3
slow_destination_rate_delay = 3s
maximal_queue_lifetime = 1d
\## Forwarding pour mails du bureau
recipient_bcc_maps = hash:/etc/postfix/recipient_bcc
message_size_limit = 524288000
smtp_helo_name = $mydomain
### Configuration serveur web (nginx)
server {
set_real_ip_from 192.169.1.1;
real_ip_header proxy_protocol;
listen 443 ssl proxy_protocol;
listen [::]:443 ssl;
ssl_certificate /etc/letsencrypt/live/mail.a-lec.org/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/mail.a-lec.org/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
# Add index.php to the list if you are using PHP
root /var/www/html/roundcube;
server_name mail.a-lec.org;
client_max_body_size 100M;
# Add index.php to the list if you are using PHP
index index.html index.htm index.php;
location / {
# First attempt to serve request as file, then
# as directory, then fall back to displaying a 404.
try_files $uri $uri/ /index.php?q=$uri&$args;
}
# pass PHP scripts to FastCGI server
#
location ~ \.php$ {
include snippets/fastcgi-php.conf;
# # With php-fpm (or other unix sockets):
fastcgi_pass unix:/run/php/php7.4-fpm.sock;
# # With php-cgi (or other tcp sockets):
# fastcgi_pass 127.0.0.1:9000;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
location ^~ /data {
deny all;
}
}