How you can set up the email notification on Proxmox


Step by step guide on how to setup email on your Proxmox host, in order to reseive email alerts.

Guide:

  1. Install the authentication library
apt-get install libsasl2-modules
  1. If Gmail has 2FA enabled, go to App Passwords and generate a new password just for Proxmox.

  2. Create a password file

nano /etc/postfix/sasl_passwd
  1. Insert your login details (substitute [email protected] and yourpassword).
smtp.gmail.com [email protected].com:yourpassword
  1. Save the password file

  2. Create a database from the password file.

postmap hash:/etc/postfix/sasl_passwd
  1. Protect the text password file.
chmod 600 /etc/postfix/sasl_passwd
  1. backup the postfix configuration file.
cp /etc/postfix/main.cf /etc/postfix/main.cf.backup
  1. Edit the postfix configuration file.
nano /etc/postfix/main.cf
  1. Add/change the following (certificates can be found in /etc/ssl/certs/)
relayhost = smtp.gmail.com:587
smtp_use_tls = yes
smtp_sasl_auth_enable = yes
smtp_sasl_security_options =
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_tls_CAfile = /etc/ssl/certs/Entrust_Root_Certification_Authority.pem
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_tls_session_cache
smtp_tls_session_cache_timeout = 3600s
  1. Reload the updated configuration
postfix reload

Testing

echo "test message" | mail -s "test subject" [email protected]