Sendmail is a popular open-source mail transfer agent (MTA) used to send and receive emails on Linux and Unix-like systems. It’s known for its reliability, flexibility, and wide range of features. Configuring Sendmail correctly is crucial for ensuring that emails are delivered successfully and securely.
To check the Sendmail configuration, you must access and review the configuration file, typically named ‘sendmail.cf’. This file contains various parameters and options that control Sendmail’s behavior, including network settings, security settings, and message routing rules.