Erreur serveur smtp avec ssmtp

Bonjour,

j'ai installer ssmtp sur ma bécanne. Mais je n'arrive pas à envoyer de mail. Voici mon erreur

monitoring@pcbench3:~$ mail gcharhon@ventesipod.com
Subject: qsdjkq
qsd
.
Cc:
send-mail: Cannot open smtp.ventesipod.com:25
Can't send mail: sendmail process failed with error code 1

Voici mon fichier de conf ssmtp.conf
#
# Config file for sSMTP sendmail
#
# The person who gets all mail for userids < 1000
# Make this empty to disable rewriting.
root=gcharhon@venteipod.com

# The place where the mail goes. The actual machine name is required no
# MX records are consulted. Commonly mailhosts are named mail.domain.com
mailhub=smtp.venteipod.com

# Where will the mail seem to come from?
#rewriteDomain=

# The full hostname
hostname=serveur_supervision

# Are users allowed to set their own From: address?
# YES - Allow the user to specify their own From: address
# NO - Use the system generated From: address
#FromLineOverride=YES

Merci de votre aide.