Multiple choice technology operating systems

How to block unknown senders in mail services

  1. use access file

  2. use mail file

  3. Configure single domain

  4. use netstat command
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A Correct answer
Explanation

In mail servers like sendmail, the access file (typically /etc/mail/access) is used to control mail relay and acceptance. You can block specific senders, domains, or IP addresses by adding reject entries to this database. This file is then compiled into a database format that the mail server uses to filter incoming connections.

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