Parce que pour du send only, postfix est overkill

SSMTP, c'est juste deux fichiers de conf:

# /etc/ssmtp/ssmtp.conf -- a config file for sSMTP sendmail.
#
# The person who gets all mail for userids < 1000
# Make this empty to disable rewriting.
root=adresse_mail
# The place where the mail goes. The actual machine name is required
# no MX records are consulted. Commonly mailhosts are named mail.domain.com
# The example will fit if you are in domain.com and you mailhub is so named.
mailhub=mail.gandi.net:587
# Where will the mail seem to come from?
#rewriteDomain=y
# The full hostname
hostname=locahost.localdomain
# Use SSL/TLS before starting negotiation
UseTLS=Yes
UseSTARTTLS=Yes

# Username/Password
AuthUser=adresse_mail
AuthPass=password

# Email 'From header's can override the default domain?
FromLineOverride=yes

#/etc/ssmtp/revaliases
# sSMTP aliases
#
# Format: local_account:outgoing_address:mailhub
#
# Example: root:your_login@your.domain:mailhub.your.domain[:port]
# where [:port] is an optional port number that defaults to 25.
root:adresse_mail:mail.gandi.net:587

Pas mal du tout

Okay!!!!!!!!!!!
On résume, parce que j'ai encore perdu du temps là dessus...

create /etc/postfix/relay_password
with
adresse.de.mon.smarthost USERNAME:PASSWORD

chmod 600 /etc/postfix/relay_password

postmap /etc/postfix/relay_password

editer /etc/postfix/main.cf

relayhost = [adresse.de.mon.smarthost]:587
smtp_use_tls=yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/relay_password
smtp_sasl_security_options =

postfix check
postfix reload
ou si service pas encore lancé
systemctl start postfix

Analyse de header de mail

Pas mal, je le teste actuellement sur un client qui a ces mails bloqué, envois de spam reporté.

Autohergement pour les mails HOWTO

+

http://artisan.karma-lab.net/propre-serveur-courrier-postfix

Transfert IMAP vers IMAP

Sous le coude, pour mon futur serveur mail perso.

Un tuto complet pour installer un serveur mail sous Archlinux