I checked sendmail on my linux server, it looks like sendmail is not installed. Can someone help me the procedure or document to install & reconfigure sendmail, thank you.

[root@xxxx-master1 ~]# service sendmail status
Redirecting to /bin/systemctl status sendmail.service
● sendmail.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)
[root@xxxx-master1 ~]#

[root@xxxx-master1 ~]# uname -a
Linux xxxx-master1 3.10.0-327.4.5.el7.x86_64 #1 SMP Thu Jan 21 04:10:29 EST 2016 x86_64 x86_64 x86_64 GNU/Linux
[root@xxxx-master1 ~]#

You want to look into postfix. That is what is shipped with redhat 7.

Do you mean I need to install postfix ? I want to install & configure sendmail on redhat linux server. It will send email to external mail. I am not linux expert.

It's quite possible your Red Hat server already has a different MTA installed, such as dovecot or exim. I know the docs refer to dovecot. https://access.redhat.com/documentat...h-mail_servers

Since you are using Red Hat, you should have a RHEL license. Have you checked with Red Hat support?

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Then you need to stop where you are. Configuring email is *NOT* a simple thing, unless it's just for internal use. If you just want a relay to an external mail server, that's fairly easy. Which is why there are MANY easily-found how-to guides that are already written about how to configure and install both sendmail and postfix on RHEL. Since you found this site with an Internet search, you can also find those guides. Read the "Question Guidelines" link in my posting signature.

Also, since you say you're using RHEL, have you contacted Red Hat support, since you're PAYING FOR RHEL, RIGHT????

Sendmail is deprecated on Rhel 7. It says so in the docs. Don't use it. It is much more difficult to configure sendmail than it is to configure postfix anyway. Also, dovecot is used for receiving email. Postfix is the default mail transport for Rhel 7, at least it was the last time I read the docs.

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