Configuring an SMTP server to send alerts when email is blocked depends on the server being used. However, here are the general steps to follow:
1. Determine your SMTP server software, for example, Postfix, Sendmail or Exim.
1. Check your server software settings to make sure alerts are enabled and SMTP settings are correct.
1. Configure log tracking software to detect email errors.
1. Configure the log tracking software to send an alert, for example by email, when it detects an error.
1. Test your configuration by sending an email to a fictitious address to verify that the alert works.
Note that depending on the server used, the steps may vary. It is recommended that you consult your mail server’s documentation for assistance specific to your configuration.
