Its now possible to extend LVM disk/partition to more than 2TB that too without using Parted, GPT or Kernel editing.After doing lots of Googling and not a single article explaining about extending LVM volume without GPT, I came up with this article which has been fully tested and working. It was tested on a 4TB disk with a single partition of 3.5TB. The LVM extension can be done without loosing any data although I would still recommend backing up the data as a precautionary measure.

NOTE: This has been tested in a DEV environment and assume no responsibility with regards to performance effect on the disk/volume in Production although the disk tested has been in a perfect condition and working for more than 2 years now.

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This article shows you how to install and configure a simple mail server called Postfix. It can be used to send emails or act as a email relay server for internal network wherein only one Server is allowed access to Internet and then all clients hosts will redirect email to this Postfix email relay server.

We would need to install two packages via YUM.

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