Install Send Only SMTP Server

Video Lecture

We will configure the alert manager to use a local SMTP server for sending email alerts.

In this lecture, we create a very quick and simple local SMTP server which can only send emails from localhost.

The commands are

1	`sudo apt install mailutils`

A postfix config screen should appear,

Choose internet site from the choices

enter the mail servers name, I will use my existing Prometheus domain i've already setup.

Then configure postfix by calling

1	`sudo nano /etc/postfix/main.cf`

scroll to the bottom, and set

1 2	`inet_interfaces = loopback-only inet_protocols = ipv4`

restart postfix

1	`sudo systemctl restart postfix`

try sending an email from the command line,

1	`echo "This is the body" \| mail -s "This is the subject" -a "FROM:root@your-domain.tld" your@email-address`

Check your SPAM folder.

If you have trouble receiving emails at your email provider, then please see my SMTP Troubleshooting page in my Zabbix course at https://sbcode.net/zabbix/setup-smtp/#troubleshooting