How to Install Sendmail on OpenBSD

Sendmail is an open-source email solution that allows you to send and receive emails on your OpenBSD operating system. In this tutorial, we'll walk you through the process of installing Sendmail on OpenBSD.

Step 1: Download the Sendmail Package

The first step is to download the Sendmail package from the Proofpoint's website. You can download the package from the following link: https://www.proofpoint.com/us/products/email-protection/open-source-email-solution

Step 2: Install the Package

Once you have downloaded the package, you need to install it on your OpenBSD system. Here's how to do it:

1. Open Terminal and navigate to the directory where you downloaded the package.
2. Run the following command to extract the package:

tar -xzvf sendmail-*.tar.gz

3. Navigate to the extracted directory:

cd sendmail-*

4. Run the following command to install Sendmail:

sudo ./Build install

5. The installation process will take some time. Once it's done, you'll see a message that says "Sendmail has been installed successfully."

Step 3: Configure Sendmail

After the installation process is complete, you need to configure Sendmail. Here's how to do it:

1. Open the Sendmail configuration file in your favorite text editor:

sudo vim /etc/mail/sendmail.cf

2. Find the line that says "Djyourhostname" and replace "yourhostname" with your actual hostname. For example:

Djexample.com

3. Save the file and exit the text editor.

Step 4: Start Sendmail

Now that Sendmail is installed and configured, it's time to start the service. Here's how to do it:

1. Run the following command to start Sendmail:

sudo /etc/rc.d/sendmail start

2. Verify that Sendmail is running by running the following command:

sudo /etc/rc.d/sendmail status

If everything is working properly, you'll see a message that says "Sendmail is running."

Conclusion

Congratulations! You have successfully installed Sendmail on OpenBSD and configured it to send and receive emails. You can now start sending emails using Sendmail.

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