Unable to send email from newly provisioned Server on Azure Cloud

sysmicuser · 03-28-2019, 09:59 PM

Hey Guys,

Wondering what could be wrong as I'm unable to send mail from RHEL 7.6

Code:

[root@fredjiraserver log]# echo "Talking from $(hostname -s)"| mail -s "Test Subject" testme@gmail.com
[root@fredjiraserver log]# send-mail: Cannot open mail:25

[root@fredjiraserver log]# mailx
No mail for root
[root@fredjiraserver log]# mail
No mail for root
[root@fredjiraserver log]# echo "Talking from $(hostname -s)"| mail -s "Test Subject" test@gmail.com
[root@fredjiraserver log]# send-mail: Cannot open mail:25

[root@localhost log]# tail -100f /var/log/maillog
Mar 29 10:00:19 localhost sSMTP[6274]: Unable to locate mail
Mar 29 10:00:19 localhost sSMTP[6274]: Cannot open mail:25
Mar 29 10:00:28 localhost sSMTP[6283]: Unable to locate mail
Mar 29 10:00:28 localhost sSMTP[6283]: Cannot open mail:25
Mar 29 10:07:28 localhost sSMTP[12543]: Unable to locate mail
Mar 29 10:07:28 localhost sSMTP[12543]: Cannot open mail:25
Mar 29 12:07:50 localhost sSMTP[18016]: Unable to locate mail
Mar 29 12:07:50 localhost sSMTP[18016]: Cannot open mail:25
Mar 29 12:10:28 localhost sSMTP[18257]: Unable to locate mail
Mar 29 12:10:28 localhost sSMTP[18257]: Cannot open mail:25
Mar 29 13:46:21 localhost sSMTP[22355]: Unable to locate mail
Mar 29 13:46:21 localhost sSMTP[22355]: Cannot open mail:25

[root@localhost log]# systemctl status mailx
Unit mailx.service could not be found.
[root@localhost log]# systemctl status mail
Unit mail.service could not be found.

[root@localhost log]# cat /etc/*release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.6 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="7.6"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.6 (Maipo)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.6:GA:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.6
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.6"
Red Hat Enterprise Linux Server release 7.6 (Maipo)
Red Hat Enterprise Linux Server release 7.6 (Maipo)
[root@localhost log]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.6 (Maipo)

Is it because a daemon is not running or the mailx or mail package is not installed?

P.S: mailx is there, mail package does not exist.

Code:

Package mailx-12.5-19.el7.x86_64 already installed and latest version
Nothing to do
yum install mail
Loaded plugins: langpacks, product-id, search-disabled-repos
No package mail available.
Error: Nothing to do

scasey · 03-28-2019, 10:08 PM

mailx/mail is an email client.

Do you have an email server running?

Code:

netstat -tnl | grep 25

Have you opened a ticket with Red Hat?

sysmicuser · 03-28-2019, 10:12 PM

The below returns nothing, would Red Hat for a free Azure VM, I wonder? I just want an empty standalone server to send email to my Gmail, so we need a client? not server?

My sincere apologies if I sound stupid.

Code:

[root@localhost log]# netstat -tnl | grep 25

sysmicuser · 03-28-2019, 10:46 PM

This is what I get when I run the subscription status command on the newly provisioned server.

Code:

 subscription-manager status
+-------------------------------------------+
   System Status Details
+-------------------------------------------+
Overall Status: Unknown


WARNING

The yum/dnf plugins: /etc/yum/pluginconf.d/subscription-manager.conf were automatically enabled for the benefit of Red Hat Subscription Management. If not desired, use "subscription-manager config --rhsm.auto_enable_yum_plugins=0" to block this behavior.

scasey · 03-29-2019, 01:00 PM

Quote:

Originally Posted by sysmicuser

The below returns nothing, would Red Hat for a free Azure VM, I wonder? I just want an empty standalone server to send email to my Gmail, so we need a client? not server?

My sincere apologies if I sound stupid.

Code:

[root@localhost log]# netstat -tnl | grep 25

Then, no, you do not have a server (sendmail, postfix, qmail, etc) running, so there's nothing to send email with. We can't tell from this if you have a server installed.

You can configure your client to use gmail instead of your server, if you don't want to run a mail server. See man mail

[strike]Aren't you paying RedHat for licensing and support? If not, you shouldn't be using it.[\strike]
Edit: On further thought, it may be included.

scasey · 03-29-2019, 07:52 PM

Quote:

Originally Posted by sysmicuser

My sincere apologies if I sound stupid.

"Stupid is as stupid does" -- Forrest Gump

You do not sound stupid.
Do you know how to
1. See if postfix is installed on your server
2. Start it if it is installed?

"No" is an acceptable answer, but if you do know how to do those things, please do them and report back.

sysmicuser · 03-31-2019, 10:15 PM

Hi Sean,

Sincerely appreciate your assistance. We as an organization have a mail server, Office 365 mail server so should I still install a mail server on my RHEL 7.6 server? If I don't wish to use Office mail server, do I have to install postfix to set up a mail server?

I don't know much about Postfix, however, I ran and it seems it is not running.

Code:

systemctl status postfix
Unit postfix.service could not be found.

I also looked at the rpm/yum, to check if the package is installed. Unfortunately, it is not installed.

Code:

rpm -qa|grep postfix
>> No output.

yum whatprovides postfix
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
2:postfix-2.10.1-6.el7.x86_64 : Postfix Mail Transport Agent
Repo        : rhui-rhel-7-server-rhui-rpms


2:postfix-2.10.1-7.el7.x86_64 : Postfix Mail Transport Agent
Repo        : rhui-rhel-7-server-rhui-rpms

My assumption is when we use Public Cloud RHEL 7.6, the subscription is already paid for the duration we have our server up and running? From the output, apparently, that's not the case.
This system is not registered with an entitlement server. You can use subscription-manager to register.

Please assist me Sean. Appreciate your assistance.

scasey · 03-31-2019, 11:36 PM

You should be able to configure mailx to use your Office 365 mail server...but I don’t know how to do that.
If you don’t want to use that server, then, yes, you’ll need to install and configure an MTA. Postfix is, I think, the current “best” choice, but I don’t know it either...

You probably need to register the server with Red Hat to be able to use their repositories.

I don’t know if your assumption about the subscription is correct. Try to register. See what happens.

My assumption: If the server is free, the subscription is not included.

The bottom line: What, exactly, are you wanting to accomplish with this (apparently) new server?

sysmicuser · 04-01-2019, 12:39 AM

Hi Sean,

I want Jira to send outgoing emails from this server. It is unable to send at the moment, so, I checked if I can at least emails from the server itself. Unfortunately, it was not hence, I am trying to see if the mailx/mail can send emails from the server itself. If that works then the application can also send emails. Else it becomes a complex issue to solve.

Make sense now?

Many thanks!

dc.901 · 04-01-2019, 06:25 AM

Maybe you already tried this, but if not, you can specify your O365 mail server SMTP IP address like this:

Code:

echo "Talking from $(hostname -s)"| mail -S smtp=<smtp IP> -s "Test Subject" testme@gmail.com

Another method is to use telnet: https://linuxconfig.org/send-an-email-using-telnet

scasey · 04-01-2019, 12:51 PM

Quote:

Originally Posted by dc.901

Maybe you already tried this, but if not, you can specify your O365 mail server SMTP IP address like this:

Code:

echo "Talking from $(hostname -s)"| mail -S smtp=<smtp IP> -s "Test Subject" testme@gmail.com

Another method is to use telnet: https://linuxconfig.org/send-an-email-using-telnet

There you go...and that can probably be configured in the OPs .mailrc and /etc/mailrc right?