Système de base : Ubuntu server 18.04

• Postfix (SMTP)
• Dovecot (IMAP)
• Rspamd (Antispam)
• Rainloop (Webmail)
• Dkim
• Filtres Sieve

# apt-get update && apt-get upgrade

# service sendmail stop; update-rc.d -f sendmail remove

"Failed to stop sendmail.service: Unit sendmail.service not loaded"

# groupadd -g 5000 vmail
# useradd -u 5000 -g vmail -s /usr/sbin/nologin -d /var/mail/vmail -m vmail

# apt install mc screen htop vim-nox curl git unzip ntp ntpdate nginx mariadb-server openssl /
php7.2-fpm php7.2 php7.2-common php7.2-gd php7.2-mysql php7.2-imap php7.2-cli php7.2-cgi /
php-pear mcrypt imagemagick libruby php7.2-curl php7.2-intl php7.2-pspell php7.2-recode /
php7.2-sqlite3 php7.2-tidy php7.2-xmlrpc php7.2-xsl memcached php-memcache php-imagick /
php-gettext php7.2-zip php7.2-mbstring

####### MYSQL #######

# mysql_secure_installation

• Enter current password for root (enter for none): ENTREE
• Set root password? [Y/n] Tapez Y
• New password: Entrez le mot de passe pour le user root
• Re-enter new password: mot de passe de nouveau...
• Remove anonymous users? [Y/n] Tapez Y
• Disallow root login remotely? [Y/n] Tapez Y
• Remove test database and access to it? [Y/n] Tapez Y
• Reload privilege tables now? [Y/n] Tapez Y

####### POSTFIXADMIN #######

# wget https://downloads.sourceforge.net/project/postfixadmin/postfixadmin/postfixadmin-3.2/postfixadmin-3.2.tar.gz
# tar xzf postfixadmin-3.2.tar.gz

# mv postfixadmin-3.2/ /var/www/postfixadmin
# rm -f postfixadmin-3.2.tar.gz
# mkdir /var/www/postfixadmin/templates_c

# chown -R www-data: /var/www/postfixadmin

# mysql -u root -p
CREATE DATABASE postfixadmin;
GRANT ALL ON postfixadmin.* TO 'postfixadmin'@'localhost' IDENTIFIED BY 'your_secret_password';
FLUSH PRIVILEGES;
exit

<?php
$CONF['configured'] = true;

$CONF['database_type'] = 'mysqli';
$CONF['database_host'] = 'localhost';
$CONF['database_user'] = 'postfixadmin';
$CONF['database_password'] = 'your_secret_password';
$CONF['database_name'] = 'postfixadmin';

$CONF['default_aliases'] = array (
   'abuse'      => 'abuse@example.com',
   'hostmaster' => 'hostmaster@example.com',
   'postmaster' => 'postmaster@example.com',
   'webmaster'  => 'webmaster@example.com'
);
$CONF['fetchmail'] = 'NO';
$CONF['show_footer_text'] = 'NO';
$CONF['quota'] = 'YES';
$CONF['domain_quota'] = 'YES';
$CONF['quota_multiplier'] = '1024000';
$CONF['used_quotas'] = 'YES';
$CONF['new_quota_table'] = 'YES';
$CONF['aliases'] = '0';
$CONF['mailboxes'] = '0';
$CONF['maxquota'] = '0';
$CONF['domain_quota_default'] = '0';
?>

sudo -u www-data php /var/www/postfixadmin/public/upgrade.php

sudo bash /var/www/postfixadmin/scripts/postfixadmin-cli admin add

Welcome to Postfixadmin-CLI v0.2
---------------------------------------------------------------

Admin:  
> postmaster@example.com

Password:  
> your_secret_password

Password (again):  
> your_secret_password

Super admin:
(Super admins have access to all domains, can manage domains and admin accounts.) (y/n)
> y

Domain:  
> example.com

Active: (y/n)
> y

The admin postmaster@example.com has been added!

# apt install software-properties-common lsb-release
# add-apt-repository ppa:certbot/certbot
# apt update
# apt install python-certbot-nginx

server {   
   listen 80;   
   listen [::]:80;   
   server_name mail.example.com;   
   root /var/www/postfixadmin/public;   
   index index.php;   
   location / {      
      try_files $uri $uri/ /index.php;   
   }   
   location ~* \.php$ {        
      fastcgi_split_path_info ^(.+?\.php)(/.*)$;        
      if (!-f $document_root$fastcgi_script_name) {return 404;}        
      fastcgi_pass  unix:/run/php/php7.2-fpm.sock;        
      fastcgi_index index.php;        
      include fastcgi_params;        
      fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;   
   }
}

# certbot --nginx -d mail.example.com

../..
    listen [::]:443 ssl http2; # managed by Certbot
    listen 443 ssl http2; # managed by Certbot
../..

# service nginx restart

 

####### POSTFIX & DOVECOT #######

# wget -O- https://repo.dovecot.org/DOVECOT-REPO-GPG | sudo apt-key add -
# echo "deb https://repo.dovecot.org/ce-2.3-latest/ubuntu/$(lsb_release -cs) $(lsb_release -cs) main" | sudo tee -a /etc/apt/sources.list.d/dovecot.list
# apt update
# debconf-set-selections <<< "postfix postfix/mailname string $(hostname -f)"
# debconf-set-selections <<< "postfix postfix/main_mailer_type string 'Internet Site'"
# apt install postfix postfix-mysql dovecot-imapd dovecot-lmtpd dovecot-pop3d dovecot-mysql

# mkdir -p /etc/postfix/sql

# nano /etc/postfix/sql/mysql_virtual_domains_maps.cf
user = postfixadmin
password = P4ssvv0rD
hosts = 127.0.0.1
dbname = postfixadmin
query = SELECT domain FROM domain WHERE domain='%s' AND active = '1'

# nano /etc/postfix/sql/mysql_virtual_alias_maps.cf
user = postfixadmin
password = P4ssvv0rD
hosts = 127.0.0.1
dbname = postfixadmin
query = SELECT goto FROM alias WHERE address='%s' AND active = '1'

# nano /etc/postfix/sql/mysql_virtual_alias_domain_maps.cf
user = postfixadmin
password = P4ssvv0rD
hosts = 127.0.0.1
dbname = postfixadmin
query = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = CONCAT('%u', '@', alias_domain.target_domain) AND alias.active = 1 AND alias_domain.active='1'

# nano /etc/postfix/sql/mysql_virtual_alias_domain_catchall_maps.cf
user = postfixadmin
password = P4ssvv0rD
hosts = 127.0.0.1
dbname = postfixadmin
query  = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = CONCAT('@', alias_domain.target_domain) AND alias.active = 1 AND alias_domain.active='1'

# nano /etc/postfix/sql/mysql_virtual_mailbox_maps.cf
user = postfixadmin
password = P4ssvv0rD
hosts = 127.0.0.1
dbname = postfixadmin
query = SELECT maildir FROM mailbox WHERE username='%s' AND active = '1'

# nano /etc/postfix/sql/mysql_virtual_alias_domain_mailbox_maps.cf
user = postfixadmin
password = P4ssvv0rD
hosts = 127.0.0.1
dbname = postfixadmin
query = SELECT maildir FROM mailbox,alias_domain WHERE alias_domain.alias_domain = '%d' and mailbox.username = CONCAT('%u', '@', alias_domain.target_domain) AND mailbox.active = 1 AND alias_domain.active='1'

# postconf -e "virtual_mailbox_domains = mysql:/etc/postfix/sql/mysql_virtual_domains_maps.cf"
# postconf -e "virtual_alias_maps = mysql:/etc/postfix/sql/mysql_virtual_alias_maps.cf, mysql:/etc/postfix/sql/mysql_virtual_alias_domain_maps.cf, mysql:/etc/postfix/sql/mysql_virtual_alias_domain_catchall_maps.cf"
# postconf -e "virtual_mailbox_maps = mysql:/etc/postfix/sql/mysql_virtual_mailbox_maps.cf, mysql:/etc/postfix/sql/mysql_virtual_alias_domain_mailbox_maps.cf"

# postconf -e "virtual_transport = lmtp:unix:private/dovecot-lmtp"
# postconf -e 'smtp_tls_security_level = may'
# postconf -e 'smtpd_tls_security_level = may'
# postconf -e 'smtp_tls_note_starttls_offer = yes'
# postconf -e 'smtpd_tls_loglevel = 1'
# postconf -e 'smtpd_tls_received_header = yes'

# postconf -e 'smtpd_tls_cert_file = /etc/letsencrypt/live/mail.exampple.com/fullchain.pem'
# postconf -e 'smtpd_tls_key_file = /etc/letsencrypt/live/mail.example.com/privkey.pem'

# postconf -e 'smtpd_sasl_type = dovecot'
# postconf -e 'smtpd_sasl_path = private/auth'
# postconf -e 'smtpd_sasl_local_domain ='
# postconf -e 'smtpd_sasl_security_options = noanonymous'
# postconf -e 'broken_sasl_auth_clients = yes'
# postconf -e 'smtpd_sasl_auth_enable = yes'
# postconf -e 'smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination'

submission inet n       -       y       -       -       smtpd 
-o syslog_name=postfix/submission 
-o smtpd_tls_security_level=encrypt 
-o smtpd_sasl_auth_enable=yes
#  -o smtpd_reject_unlisted_recipient=no 
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o smtpd_helo_restrictions=$mua_helo_restrictions
#  -o smtpd_sender_restrictions=$mua_sender_restrictions
#  -o smtpd_recipient_restrictions=
#  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject 
-o milter_macro_daemon_name=ORIGINATING

smtps     inet  n       -       y       -       -       smtpd 
-o syslog_name=postfix/smtps 
-o smtpd_tls_wrappermode=yes 
-o smtpd_sasl_auth_enable=yes
#  -o smtpd_reject_unlisted_recipient=no 
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o smtpd_helo_restrictions=$mua_helo_restrictions
#  -o smtpd_sender_restrictions=$mua_sender_restrictions
#  -o smtpd_recipient_restrictions=
#  -o smtpd_relay_restrictions=permit_sasl_authenticated,reject 
-o milter_macro_daemon_name=ORIGINATING

# service postfix restart

####### DOVECOT CONFIG #######

# nano /etc/dovecot/dovecot-sql.conf.ext
driver = mysqlconnect = host=127.0.0.1 dbname=postfixadmin user=postfixadmin password=your_secret_password
default_pass_scheme = MD5-CRYPT
iterate_query = SELECT username AS user FROM mailbox
user_query = SELECT CONCAT('/var/mail/vmail/',maildir) AS home, \  CONCAT('maildir:/var/mail/vmail/',maildir) AS mail, \  5000 AS uid, 5000 AS gid, CONCAT('*:bytes=',quota) AS quota_rule \  FROM mailbox WHERE username = '%u' AND active = 1
password_query = SELECT username AS user,password FROM mailbox \  WHERE username = '%u' AND active='1'

# nano /etc/dovecot/conf.d/10-mail.conf
...
mail_location = maildir:/var/mail/vmail/%d/%n
...
mail_uid = vmail
mail_gid = vmail

...
first_valid_uid = 5000
last_valid_uid = 5000

...
mail_privileged_group = mail
...
mail_plugins = quota
...

# nano /etc/dovecot/conf.d/10-auth.conf
...
disable_plaintext_auth = yes
...
auth_mechanisms = plain login
...
#!include auth-system.conf.ext
!include auth-sql.conf.ext
...

# nano /etc/dovecot/conf.d/10-master.conf
...
service lmtp {
  unix_listener /var/spool/postfix/private/dovecot-lmtp {
    mode = 0600
    user = postfix
    group = postfix
  }
...
}
...
service auth {
  ...
  unix_listener auth-userdb {
    mode = 0600
    user = vmail
    group = vmail
  }
  ...
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
    user = postfix
    group = postfix
  }
  ...
}
...

service auth-worker {
  user = vmail
}

...

service dict {
  unix_listener dict {
    mode = 0660
    user = vmail
    group = vmail
  }
}
...

# nano /etc/dovecot/conf.d/10-ssl.conf
...
ssl = yes

...
ssl_cert = </etc/letsencrypt/live/mail.example.com/fullchain.pem
ssl_key = </etc/letsencrypt/live/mail.example.com/privkey.pem
ssl_dh = </etc/letsencrypt/ssl-dhparams.pem
...
ssl_cipher_list = EECDH+AES:EDH+AES+aRSA
...
ssl_prefer_server_ciphers = yes
...

# nano /etc/dovecot/conf.d/20-imap.conf
...
protocol imap { 
...

  mail_plugins = $mail_plugins imap_quota
  ...
}
...

 # nano /etc/dovecot/conf.d/20-lmtp.conf
...
protocol imap {
  postmaster_address = postmaster@example.com
  mail_plugins = $mail_plugins
}
...

# nano /etc/dovecot/conf.d/15-mailboxes.conf
...
mailbox Drafts {
  special_use = \Drafts
}
mailbox Spam {
  special_use = \Junk
  auto = subscribe
}
mailbox Junk {
  special_use = \Junk
}
...

# nano /etc/dovecot/conf.d/90-quota.confplugin {
quota = dict:User
quota::proxy::sqlquota
quota_rule = *:storage=5GB
quota_rule2 = Trash:storage=+100M
quota_grace = 10%%
quota_exceeded_message = Quota exceeded, please contact your system administrator.}

plugin {
quota_warning = storage=100%% quota-warning 100 %u
quota_warning2 = storage=95%% quota-warning 95 %u
quota_warning3 = storage=90%% quota-warning 90 %u
quota_warning4 = storage=85%% quota-warning 85 %u
}

service quota-warning {
executable = script /usr/local/bin/quota-warning.sh
user = vmail

unix_listener quota-warning {
  group = vmail
  mode = 0660
  user = vmail
}
}

dict {
sqlquota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
}

# nano /etc/dovecot/dovecot-dict-sql.conf.ext
...
connect = host=127.0.0.1 dbname=postfixadmin user=postfixadmin password=your_secret_password
...
map {
  pattern = priv/quota/storage
  table = quota2
  username_field = username
  value_field = bytes
}
map {
  pattern = priv/quota/messages
  table = quota2
  username_field = username
  value_field = messages
}
...
# map {
#   pattern = shared/expire/$user/$mailbox
#   table = expires
#   value_field = expire_stamp
#
#   fields {
#     username = $user
#     mailbox = $mailbox
#   }
# }
...

# nano /usr/local/bin/quota-warning.sh
#!/bin/sh
PERCENT=$1
USER=$2
cat << EOF | /usr/lib/dovecot/dovecot-lda -d $USER -o "plugin/quota=dict:User quota::noenforcing:proxy::sqlquota"
From: postmaster@example.com
Subject: Quota warning

Your mailbox is $PERCENT% full. Don't forget to make a backup of old messages to remain able to receive mails.
EOF

# sudo chmod +x /usr/local/bin/quota-warning.sh

# service dovecot restart

####### RSPAMD #######

# apt install redis-server

# apt install software-properties-common lsb-release
# apt install lsb-release wget
# wget -O- https://rspamd.com/apt-stable/gpg.key | sudo apt-key add -
# echo "deb http://rspamd.com/apt-stable/ $(lsb_release -cs) main" | sudo tee -a /etc/apt/sources.list.d/rspamd.listsudo
# apt update
# apt install rspamd

# nano /etc/rspamd/local.d/worker-normal.inc
bind_socket = "127.0.0.1:11333";

# nano /etc/rspamd/local.d/worker-proxy.inc
bind_socket = "127.0.0.1:11332";
milter = yes;
timeout = 120s;
upstream "local" {
  default = yes;
  self_scan = yes;
}

# rspamadm pw --encrypt -p P4ssvv0rD

# nano /etc/rspamd/local.d/worker-controller.inc
password = "CLE_GENEREE_PLUS_HAUT"

# nano /etc/rspamd/local.d/classifier-bayes.conf
servers = "127.0.0.1";
backend = "redis";

# nano /etc/rspamd/local.d/milter_headers.conf
use = ["x-spamd-bar", "x-spam-level", "authentication-results"];

# systemctl restart rspamd

# nano /etc/nginx/conf.d/spam.example.com.conf
server {
listen 80;  
listen [::]:80;  
server_name spam.example.com;  

location / {  
   proxy_pass http://127.0.0.1:11334/;     
   proxy_set_header Host $host;     
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;     
}  

}

# certbot --nginx -d spam.example.com

# postconf -e "milter_protocol = 6"
# postconf -e "milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}"
# postconf -e "milter_default_action = accept"
# postconf -e "smtpd_milters = inet:127.0.0.1:11332"
# postconf -e "non_smtpd_milters = inet:127.0.0.1:11332"

# systemctl restart postfix

####### DOVECOT 2 #######

# apt install dovecot-sieve dovecot-managesieved

# nano /etc/dovecot/conf.d/20-lmtp.conf
protocol lmtp {
postmaster_address = postmaster@example.com
mail_plugins = $mail_plugins sieve
}

# nano /etc/dovecot/conf.d/20-imap.conf
...
protocol imap {
...
mail_plugins = $mail_plugins imap_quota imap_sieve
...
}
...

# nano /etc/dovecot/conf.d/20-managesieve.conf
...
service managesieve-login {
inet_listener sieve {
port = 4190  
}
...
}
..

service managesieve {
process_limit = 1024
}
...

# nano /etc/dovecot/conf.d/90-sieve.conf
plugin {
...  
# sieve = file:~/sieve;active=~/.dovecot.sieve  
sieve_plugins = sieve_imapsieve sieve_extprograms  
sieve_before = /var/mail/vmail/sieve/global/spam-global.sieve  
sieve = file:/var/mail/vmail/sieve/%d/%n/scripts;active=/var/mail/vmail/sieve/%d/%n/active-script.sieve  

imapsieve_mailbox1_name = Spam  
imapsieve_mailbox1_causes = COPY  
imapsieve_mailbox1_before = file:/var/mail/vmail/sieve/global/report-spam.sieve  

imapsieve_mailbox2_name = *  
imapsieve_mailbox2_from = Spam  
imapsieve_mailbox2_causes = COPY  
imapsieve_mailbox2_before = file:/var/mail/vmail/sieve/global/report-ham.sieve  

sieve_pipe_bin_dir = /usr/bin  
sieve_global_extensions = +vnd.dovecot.pipe  
....  
}

# mkdir -p /var/mail/vmail/sieve/global

# nano /var/mail/vmail/sieve/global/spam-global.sieve
require ["fileinto","mailbox"];

if anyof(
header :contains ["X-Spam-Flag"] "YES",  
header :contains ["X-Spam"] "Yes",  
header :contains ["Subject"] "*** SPAM ***"  
)  
{
fileinto :create "Spam";  
stop;  
}

# nano /var/mail/vmail/sieve/global/report-spam.sieve
require ["vnd.dovecot.pipe", "copy", "imapsieve"];
pipe :copy "rspamc" ["learn_spam"];

# nano /var/mail/vmail/sieve/global/report-ham.sieve
require ["vnd.dovecot.pipe", "copy", "imapsieve"];
pipe :copy "rspamc" ["learn_ham"];

# systemctl restart dovecot

# sievec /var/mail/vmail/sieve/global/spam-global.sieve
# sievec /var/mail/vmail/sieve/global/report-spam.sieve
# sievec /var/mail/vmail/sieve/global/report-ham.sieve
# chown -R vmail: /var/mail/vmail/sieve/

####### DKIM #######

# mkdir /var/lib/rspamd/dkim/

# rspamadm dkim_keygen -b 2048 -s mail -k /var/lib/rspamd/dkim/mail.key /var/lib/rspamd/dkim/mail.pub>

# chown -R _rspamd: /var/lib/rspamd/dkim
# chmod 440 /var/lib/rspamd/dkim/*

# nano /etc/rspamd/local.d/dkim_signing.conf
selector = "mail";
path = "/var/lib/rspamd/dkim/$selector.key";
allow_username_mismatch = true;

# cp /etc/rspamd/local.d/dkim_signing.conf /etc/rspamd/local.d/arc.conf

# systemctl restart rspamd

####### DNS #######

# cat /var/lib/rspamd/dkim/mail.pub
mail._domainkey IN TXT ( "v=DKIM1; k=rsa; "
"p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqdBRCqYzshc4LmmkxUkCH/rcIpSe/QdNIVmBrgqZmZ5zzWQi7ShdFOH7V32/VM1VRk2pkjDV7tmfbwslsymsfxgGhVHbU0R3803uRfxAiT2mYu1hCc9351YpZF4WnrdoA3BT5juS3YUo5LsDxvZCxISnep8VqVSAZOmt8wFsZKBXiIjWuoI6XnWrzsAfoaeGaVuUZBmi4ZTg0O4yl"   
"nVlIz11McdZTRe1FlONOzO7ZkQFb7O6ogFepWLsM9tYJ38TFPteqyO3XBjxHzp1AT0UvsPcauDoeHUXgqbxU7udG1t05f6ab5h/Kih+jisgHHF4ZFK3qRtawhWlA9DtS35DlwIDAQAB"   
) ;

####### RAINLOOP WEBMAIL #######

cd /tmp
wget http://www.rainloop.net/repository/webmail/rainloop-community-latest.zip

# mkdir /var/www/webmail
# unzip rainloop-community-latest.zip -d /var/www/webmail
# chown -R www-data:www-data /var/www/webmail

# nano /etc/nginx/conf.d/webmail.example.com.conf
server {
listen 80;  
listen [::]:80;  
root /var/www/webmail;  
index index.php index.html index.htm;   
server_name webmail.example.com;  

client_max_body_size 100M;  

location / {  
   try_files $uri $uri/ /index.php?$query_string;  
}       

location ~ \.php$ {  
   include snippets/fastcgi-php.conf;       
   fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;       
   fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;       
   include fastcgi_params;       
}  

location ^~ /data {   
   deny all;       
}    

}

# certbot --nginx -d webmail.example.com

# nano /etc/rspamd/override.d/classifier-bayes.conf
autolearn = true;

systemctl restart rspamd

J'utilise Protonmail depuis quelques semaines et je suis entièrement satisfait.
Pas encore francisé mais parfaitement utilisable, Protonmail n'offre pas qu'un simple service mail : mais bien plus !
L'offre de base (gratuite) vous permet d'obtenir une adresse e-mail en @protonmail.com avec 500 Mo.
L'offre payante à 5 € commence à être très inétressante : 5 Go, 5 adresses, VPN et possibilité de configurer un "custom domain", c'est à dire d'utiliser le MX de protonmail pour votre domaine.
Pour cela, protonmail propose 7 étapes.

Il vous suffit de suivre l'assistant de configuration qui va vous aiguiller et vous présenter les bonnes config (notamment au niveau config DNS...).

Voici les 7 étapes en images :

Une fois fait vous devrez attendre 1 heure ou deux, ... voir plus, pour que les nouvelles options du DNS se propagent (MX, opendkim, SPF, opendmarc, ...)
Si tout est bon, vous devrirez donc voir passer au vert les 6 "cases" de la configuation du "custom domain".

Vous pourrez alors créer une (ou plusieurs) adresse e-mail pour votre domaine et tous les mails pour cette adresse arriveront dans votre boite mail Protonmail.

Un dernier test :
[olivier@archy ~]$ host citizenz.info
citizenz.info has address 37.187.121.56
citizenz.info has IPv6 address 2001:41d0:a:f238::1
citizenz.info mail is handled by 10 mail.protonmail.ch.

On peut bien voir ici que le MX de citizenz.info est bien mail.protonmail.ch.
Je vous recommande chaudement Protonmail pour sa simplicité d'utilisation.

L'utilisation du VPN Protonmail est aussi un avantage important car il permet de configurer sa connexion avec plusieurs niveaux sécurité (voir cet article).

Pour rappel, Protonmail vous propose 3 niveau d'utilisation :
1 - GRATUIT : 500 MB, 1 adresse, 150 messages par jour, 20 labels, support limité
2 - 5 € / mois ou 48 € / an (soit 4 € / mois) : 5 GB, 1 custom domain, VPN, 5 adresses, 1000 messages par jour, 200 labels (et répertoires), support, filtres d'email. Vous pouvez également choisir plus de stockage, plus d'adresses etc. moyennant finance.
3 - 30 € /mois ou 288 € / an (soit 24 € / mois) : 20 GB, 10 custom domains, 50 adresses, envois illimités, labels et repertoires illimités, support prioritaire, filtres d'e-mail, etc.

Voici une méthode fort simple, pour se connecter directement à un serveur ssh sans avoir à rentrer le mot de passe utilisateur à chaque fois.
Plutôt pratique surtout si vous avez "bétonner" votre mot de passe avec 32 caractères ! ;) ...

Lire la suite de Connexion par clé privée à un serveur SSH

Excellent article sur http://www.tutodidacte.com sur l'art et la manière d'avoir un petit serveur de mail"aux petits oignons" à base de Postfix (SMTP), dovecot (Pop3 et Imap) avec la cerise sur le gâteau : Amavisd-new, Spamassassin (Spam) et ClamAv (antivirus) (le tout sous système Debian ou Debian-Like).

Au final on obtient un serveur de mail simple mais fonctionnel. Testé pour vous : ça fonctionne très bien !.

Ca se passe ici : http://www.tutodidacte.com/postfix-installer-amavis-spamassassin-et-clamav