Introduction Nagios is an open-source IT system monitoring tool. It sends alerts when critical infrastructure components fail and recover, providing administrators with notice of important events Prerequisites Implementation (1) Define email notification commands$ vi /usr/local/nagios/etc/objects/commands.cfg ======== Add /edit the below lines # ‘notify-host-by-email’ command definition define command { command_name   … Continue Reading How to enable email notifications for the Nagios alerts

Introduction SSL is the standard technology for securing an internet connection by encrypting data sent between a website and a browser (or between two servers). It prevents hackers from seeing or stealing any information transferred, including personal or financial data Prerequisites Implementation Step 1: Log in to the Plesk Panel as… Continue Reading How to set up SSL (Let’s Encrypt) for a Plesk mail server

Setup Postfix with Mailgun for reliable E-Mail Delivery on Ubuntu Date: 24-08-2020 Install Postfix: Postfix is a mail transfer agent (MTA) which is the responsible software for delivering & receiving emails, it’s essential in order to create a complete mail server. Step 1: Login to the server by using ssh. As… Continue Reading Setup Postfix with Mailgun for reliable E-Mail Delivery on Ubuntu

How To Fix postfix delayed mail delivery Date posted : 31/05/2019 In this article, we’re going to explain about resolving the delayed mail deliveries. Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail. For instance, we’ve faced issues where mails from our server to gmail was received successfully. However mails… Continue Reading How To Fix postfix delayed mail delivery

What is SquirrelMail? SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols,   #1 Add epel repo wget rpm -Uvh epel-release-5-4.noarch.rpm #2 Install Squirrelmail yum install squirrelmail -y Navigate to /usr/share/squirrelmail/config/ directory and run the command… Continue Reading install Squirrelmail On CentOS

Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail, intended as an alternative to Sendmail MTA. Remove sendmail if it was already installed on your system yum remove sendmail #1 Install Postfix Now Install Postfix  and make sure it started at boot by adding… Continue Reading install and configure postfix and dovecot on CentOS

Date Posted:22-02-2017 Its a biggest challenge for a new mail server to reach popular mail provider user’s inbox. One of the best way is to sign the outgoing mail server using dkim. There are multiple ways to implement dkim signing. We are going to use opendkim as a service to… Continue Reading Dkim Setup on Postfix Mailserver – Centos 6/7