This is a very simple postfix example, plus iptables
1. install postfix, change it into the default email sender
yum install postfix -y
vim /etc/postfix/main.cf
turn inet_interface=all on and turn inet_interface=localhost off
service sendmail stop
chckconfig sendmail off
service postfix start
chkconfig postfix on
 
alternative –config mta
2
 
iptables -I INPUT -s 192.168.0.0/24 -p tcp –dport 25 -j ACCEPT
 
echo ‘ test’ | mail -s ‘this is a test’ rocky@localhost
 

About Lei

I am an IT specialist with over 10 year experience - years on Automation, on-Premise or Azure.

I am happy to develop however never want be a full time developer. Only do what I have to do. If it has to be PowerShell,HTML, PHP, CSS, C#, VBS or JS, front end or backend, so be it, doesn't matter!

Spent years with Windows, SCCM, SharePoint, SQL and Exchange servers. For last several years, I have been actively working under On Premise > Azure environment.

THERE IS NO WAY BACK!!!

Current Certificates:
    Microsoft® Certified-
  • -Enterprise Administrator
  • -Database Administrator
  • -SharePoint Administrator
  • -Administering and Deploying SCCM 2012
Red Hat Certified Technician
ITIL V3 Foundation - Practitioner

Working on Azure Certificates now and hopefully they can stop upgrading their questions one day! GIVE ME A BREAK!

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