How Do I Know If Sendmail Is Installed Linux?
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Type “ps -e | grep sendmail” (without quotes) at the command line. Press the “Enter” key. This command prints a listing that includes all running programs whose name contains the text “sendmail.” If sendmail is not running, there will be no results.

How do I know if mailx is installed Linux?

On CentOS/Fedora based systems, there is only one package named “mailx” which is the heirloom package. To find out what mailx package is installed on your system, check the “man mailx” output and scroll down to the end and you should see some useful information.

How do I enable sendmail?

So, the steps I recommend for configuring sendmail are as follows:

  1. Edit the /etc/sendmail.mc file. Most of what you need to do to configure sendmail can be done by editing this file.
  2. Generate the sendmail.cf file from the edited sendmail.mc file. …
  3. Review your sendmail.cf configuration. …
  4. Restart the sendmail server.
Maya Lin-Takahashi

Maya Lin-Takahashi

Consumer Tech & Gadget Reviewer

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.

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