short but sweet

firewall-cmd --permanent --zone=public --add-service=http
firewall-cmd --permanent --zone=public --add-service=https
firewall-cmd --reload

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as a fix solution you can use google, as smtp relay for e.g. notifications. In this example I am working on a Fedora 27 Host.

Install needed packages

dnf -y install postfix mailx cyrus-sasl-plain

Restart and enable services

systemctl restart postfix && systemctl enable postfix

Adjust /etc/postfix/ depends your needs (marked in red)

myhostname =

relayhost = []:587
smtp_use_tls = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt
smtp_sasl_security_options = noanonymous
smtp_sasl_tls_security_options = noanonymous

Setup the secret

vim /etc/postfix/sasl_passwd
[]:587 username:password

Issue the command postmap to read the new secret

postmap /etc/postfix/sasl_passwd

Set correct owner and permissons

chown root:postfix /etc/postfix/sasl_passwd
chmod 640 /etc/postfix/sasl_passwd

Reload the service

systemctl reload postfix

Verify the setup, by sending you a Test Notification Mail

echo "Test Mail" | mail -s "Test Notification Mail"


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common on recent harware changes
First boot into the rescue mode, then change to the boot directory

cd /boot

perform a copy of the current files as security purpose

cp -p initramfs-3.10.0-693.17.1.el7.x86_64.img initramfs-3.10.0-693.17.1.el7.x86_64.img.bak

build a new one

dracut -f -H initramfs-3.10.0-693.17.1.el7.x86_64.img 3.10.0-693.17.1.el7.x86_64

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Open a regular command prompt (win+r then cmd)
Right-click the title bar and select Properties
Deselect “Use legacy console (requires restart)”

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