To configure an SMTP server to use authentication to send emails, follow these steps:
1. Open the configuration file for your SMTP server. This file is usually named something like “smtp.conf” or “sendmail.cf”.
1. Look for a section of the configuration file that deals with authentication. This section may have a heading like “AUTH” or “AUTHENTICATION”.
1. If authentication is not already enabled, enable it by setting the appropriate options in this section of the configuration file. The exact options you need to set will depend on the specific SMTP server software you’re using.
1. Specify the username and password for the account that you want to use to send emails. This information is typically entered in a “USERNAME” and “PASSWORD” field in the authentication section of the configuration file.
1. If your SMTP server requires SSL/TLS encryption for authentication, you may need to specify additional options to enable this.
1. Save the changes to the configuration file and restart your SMTP server.
Once you have configured authentication for your SMTP server, you will need to update any email client software (such as Outlook or Thunderbird) to use the appropriate login credentials when sending email through your SMTP server.
