This document explain how to configure a quick mail system on FreeBSD

SSMTP is the package which permit the system to send email

pkg install ssmtp

We receive the following information of the package :

sSMTP has been installed successfully.

Firstly, edit /etc/mail/mailer.conf to replace sendmail with ssmtp:

sendmail	/usr/local/sbin/ssmtp
send-mail	/usr/local/sbin/ssmtp
mailq		/usr/local/sbin/ssmtp
newaliases	/usr/local/sbin/ssmtp
hoststat	/usr/bin/true
purgestat	/usr/bin/true

Hint: in case sSMPT is being installed directly from ports,
editing /etc/mail/mailer.conf can be done by running "make replace".

Secondly, edit the following files to configure sSMTP:

- /usr/local/etc/ssmtp/revaliases
- /usr/local/etc/ssmtp/ssmtp.conf

At this point sSMTP should be ready to go.
--
===>   NOTICE:

The ssmtp port currently does not have a maintainer. As a result, it is
more likely to have unresolved issues, not be up-to-date, or even be removed in
the future. To volunteer to maintain this port, please create an issue at:

https://bugs.freebsd.org/bugzilla

More information about port maintainership is available at:

https://www.freebsd.org/doc/en/articles/contributing/ports-contributing.html#maintain-port
So we can go to the configuration

System mailer modification
Firstly, edit /etc/mail/mailer.conf to replace sendmail with ssmtp:

sendmail	/usr/local/sbin/ssmtp
send-mail	/usr/local/sbin/ssmtp
mailq		/usr/local/sbin/ssmtp
newaliases	/usr/local/sbin/ssmtp
hoststat	/usr/bin/true
purgestat	/usr/bin/true

then tape the following command

cd /etc/mail/
make
make install

cat > /usr/local/etc/ssmtp/revaliases << EOF
# 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:admin@limis.fr:ns0.ovh.net:465
EOF

cat > /usr/local/etc/ssmtp/ssmtp.conf << EOF
#
# /etc/ssmtp.conf -- a config file for sSMTP sendmail.
#

# The person who gets all mail for userids < 1000
# Make this empty to disable rewriting.
root=fabien.costard@limis.fr

# 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 your mailhub is so named.
mailhub=ssl0.ovh.net:465

# Example for SMTP port number 2525
# mailhub=mail.your.domain:2525
# Example for SMTP port number 25 (Standard/RFC)
# mailhub=mail.your.domain        
# Example for SSL encrypted connection
# mailhub=mail.your.domain:465

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

# The full hostname
hostname=<full hostname>

# Set this to never rewrite the "From:" line (unless not given) and to
# use that address in the "from line" of the envelope.
#FromLineOverride=YES

# Use SSL/TLS to send secure messages to server.
UseTLS=YES
AuthUser=<your user account>
AuthPass=<your password>

# Use SSL/TLS certificate to authenticate against smtp host.
#UseTLSCert=YES

# Use this RSA certificate.
#TLSCert=/usr/local/etc/ssmtp/ssmtp.pem

# Get enhanced (*really* enhanced) debugging information in the logs
# If you want to have debugging of the config file parsing, move this option
# to the top of the config file and uncomment
#Debug=YES
EOF

Tape the following command to test if the mail is currently working

echo "contenu" | mail -s "test" fabien.costard@limis.fr

If you receive the email, you won ! Next day, you will receive the automatic reports.

Modify the /etc/crontab file to add the following command

0       3       *       *       *       root    /usr/sbin/freebsd-update cron