Where is sendmail on linux

Note: A user defined in the aliases file is valid for all domains hosted by the system, unless you have configured virtual hosting. For alternate configurations change the file: sendmail. The config file sendmail. Pre-configured ". Red Hat 7. The default configuration for Red Hat 7. Useful against DoS attacks or barrages of spam: Available with Sendmail version 8. Define rule in sendmail. Also see: Sendmail. See Sendmail. In this post, you'll find examples of how to send email from the terminal.

We'll look at custom configurations and touch on how to set up SMTP connections to email accounts or email service providers. I'll show you how to install the necessary console mailer packages and provide background for command line options based on the package's manuals.

All the mailer packages throughout the tutorial are available through Debian's Advanced Package Manager so the installation steps in the example below may be used for all the showcased packages.

Please note that these pieces of software may be installed by other default package managers such as yum or dnf depending on your Linux system distribution. In most cases, either sendmail or postfix is available in each Linux distribution out-of-the-box or at least that's what similar blog posts say.

Either I'm unlucky or the others were wrong, but I had to install one manually. However, you definitely need one of them for email delivery. SSMTP contains the sendmail package under the hood as you'll see and it facilitates the configuration, which is pretty hard for sendmail otherwise.

Type in the mailer package's name just the way you would run the command, to check if it's available:. If the package is installed, the command runs, and the prompt changes — while trying to execute the command — and you'll see a blinking cursor followed by the message Recipient names must be specified in the case of sendmail.

Conclusion: the package is installed. If the package is NOT installed, you'll receive a warning message and a suggestion how to install it:. In this example, I tried if the sendmail command works. After we add the SSMTP package, this command and the ssmtp command will both work and change the command prompt in the terminal. Let's look at that! As the terminal output suggested, we need to run the Advanced Package Manager's install command — usually with root permission — to install the necessary package.

As mentioned before, the configurations are much simpler for sendmail when you abstract away the complexity of the configuration. After the installation completed, you can check if sendmail is able to forward messages.

Type the below code in the terminal:. It should send out the email if everything works correctly. Here the "hello" string piped to the sendmail command will be the subject of the sent message, while the defined email address is naturally the recipient of the email.

You run the command The reason for this is that we didn't provide mailhub settings at all. In order to forward messages, you need an SMTP server configured. That's where SSMTP performs really well: you just need to edit its configuration file once, and you are good to go. Here, you should put the code below to configure an SMTP relay:. This means that you set up an external service that will actually forward your emails.

When you provide credentials to Gmail for example, you'll see the messages sent from the terminal in your mailbox's 'Sent mail' directory. The configurations look similar with other services too. This was the basic configuration for sendmail and the installation steps for any frequently used command line mailer package. Next, we'll jump on installing and trying out various other packages.

This is a nice little tool we just configured for mail delivery. As its man page suggests , it's a minimalistic emulator of sendmail. It provides the means to connect to a mailhub with a proper configuration file.

If your config file was set up right, all your worries regarding command line email sending can disappear. Following the ssmtp command, you should put the recipient address, then you can include a file that will show in the email body. Here you can define headers for the message, list further recipients and set the content type.

This way you can send HTML emails. SSMTP will interpret your message and use the provided values properly. Here is an example of an HTML you might send:. You can't really give further options with SSMTP as they are not respected by its minimalistic design.

To get rid of this error, you need to change the settings in your Gmail account — you can look up more information on potential risks there as well. For quite some time now sendmail is the classical mail transfer agent from the world of UNIX. It was first introduced in and its highly-configurable nature and scalability made it the default go-to for server administrators.

We've already seen how to send basic emails by the ssmtp command, so let's see the difference using sendmail :. I threw in the -v argument, which will make the communication between the mail server and your mail transfer agent visible.

There are plenty of configurations that you can use if you set up your own mail server and implement sendmail on it. Registered User. Join Date: Apr Hi, just a small question.. I am using sendmail, how do I find out where exactly in which directory is the program located? Clarifying sendmail configuration - sendmail-client offline.

Hi all, I have read about sendmail running as 2 separate process. In my current configuration, the sendmail-client is disabled. Both submit. Sendmail questions, SCO 5.

I am running SCO 5. When trying to send mail the following message will kick back. Shell Programming and Scripting. Sendmail Script: Gmail cannot find attachments. The scipt makes use of sendmail. The scripts works for everything except gmail.