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About me

HI, I’M Ketan Aagja

Manager IT with more than 15+ years of experience in the planning, design, and implementation of network technologies and infrastructures.

Windows workgroups and Domains, Linux SAMBA, DHCP, DNS, Ethernet, TCP / IP, active directory services, Terminal Services, voice, telephony services and virtualization.

Skilled in information systems management, analysis, troubleshooting, testing, documentation, internal control procedures, system and program security, systems analysis, hardware and software installation, applications and program management, technical support and network administration.

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iRedMail Server Postfix

Increase iRedMail Performance to process more emails

How to increase iRedMail performance to process more emails? This is the question that has been harassing many iRedMail administrators. I had been playing with iRedMail performance since 5+ years now. And still not thinking to discontinue it. If you haven’t tried your hands on this powerful mammoth of Email server, give it a try here: iRedMail Site. Start testing it and see how simple it is to install, configure and go live. Creator and core developer of iRedMail (ZhangHuangbin) also has created beautiful, neat and easy to understand help documents. Following documents you can configure almost everything. iRedMail Document Site I run my iRedMail performance server on following specs. This is far better or I would......

January 5, 2017
CentOS iRedMail Server Linux

OpenLDAP Master Slave Replication In A Minute

Often I have seen that OpenLDAP Master Slave Replication seems heavy job for server administrators. Many articles are available to achieve this scenario but majority of the articles are so detailed that mostly administrators gets confused about their replication. Many time they applies replication configuration on server but loses data on either server or sometime whole database. Or gets locked out from database where they are not able to recover data. Many time, I also have made mistakes in learning OpenLDAP Master Slave Replication on my test servers, but just to understand and learn the whole process. Here is how you can achieve OpenLDAP Master Slave Replication in just a minute. Applied on CentOS Linux......

January 6, 2017
CentOS Dovecot iRedMail Server Linux

Two way Dovecot Server Replication / Mirroring

Here is step-by-step guide to achieve two way Dovecot server replication / mirroring. I had been searching a lot to achieve two way dovecot server replication / mirroring and had been trying out many things. None methods were giving me sure shot and performance intensive results. Well you all do is, play with it more to understand it more and achieve more. This is what I did and achieved what I needed. Sharing with you all that what configuration I made with my both live production servers which are now replicating each and every emails with each other. I have not received any single email replication related issue since last 2 years. And still it is......

January 5, 2017
CentOS Linux Windows Zimbra Server

Whitelist or Blacklist per IP on Zimbra Server – Batch File

Whitelist or Blacklist per IP on Zimbra Server – Batch File, are you getting many spam requests from IP addresses? Do you want to block or allow IPs instantly? It’s been one hectic task for Email Administrators when they need to manage IP based whitelist and blacklist. Well here is the hassle free solution…!!! Check out my other Zimbra Batch files: Zimbra User Management Zimbra Group / Distribution Lists Management You will have to apply and modify some of the changes to get this work for you on your Zimbra Open Source Collaboration Server. Here is the guide that you need to follow first before going further below. Click HERE I believe you have changed your......

February 28, 2017
CentOS Linux Zimbra Server

Zimbra Group Management – Batch File

Zimbra Group Management – Batch File, my another batch file to manage Groups or Distribution lists on Zimbra server from your Windows PC. Check out my Zimbra User Management – Batch File : HERE Find our more information about Zimbra here – Zimbra Collaboration Open Source Edition It is very simple batch file, just to achieve three simple activities from Zimbra Group Management – Batch File using SSH from any windows PC: Create Distribution List Add Member to Group List Remove member from Group Here are the basic requirements that you need when you use this batch file: Install PUTTY on your windows PC where you will be using this batch file. (Get PUTTY –......

February 28, 2017
CentOS Linux Windows Zimbra Server

Zimbra User Management – Batch File

Everybody loves Zimbra. The best in class Zimbra Collaboration Open Source Email server with contacts, tasks and calendar management on your finger tips. I indeed love it and recommend it to small and medium businesses when they ask me how can we achieve best in-house Email server. Even many big data enterprises are also using this feature rich daemon. Find our more information about Zimbra here – Zimbra Collaboration Open Source Edition System / email administrators manages users from Zimbra Admin Panel where they can create / modify and delete users and do many things. However I find it quite lazy myself when administering users using Zimbra Admin Panel. Believe me, login on to Zimbra Admin panel, issuing......

February 28, 2017

HI, I’M Ketan Aagja

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