Setting up a virtual Postfix mail server — Part 1

Setting up a virtual Postfix mail server — Part 1: Receiving emails with mail forwarding

If you own a domain, and are looking to set up email hosting for it, you have a couple of options. You can either:

  1. Get a generic web hosting service that comes with a cPanel-based email hosting service, or;
  2. Use services like Google Workspace or Microsoft’s Enterprise Email Service.

The former option is cheap, but can be clunky to use and ineffective with blocking spam. The latter option — being specialised services — are generally much more accessible and effective with spam, but cost more.

There’s actually also a third option, and that is:

  1. Running your own mail server on a cloud server.

This means that you have to set up the server and maintain it, but it also means that you can have a cheap and effective mail server, instead of having to choose between one or the other.

In this series of articles, we are going to explore how we can set up a virtual mail server using a Mail Transfer Agent (MTA) called Postfix. This will be a fully-featured mail server, meaning that over the course of these articles, we will be building a mail server that can:

  1. Send and receive emails,
  2. Filter incoming emails for spam, and;
  3. Pass email policy checks, so that the emails it sends out are not flagged as spam.
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Setting up Unity's Device Simulator

Setting up Unity’s Device Simulator

Unity’s Device Simulator is a very nice extension in Unity that allows users to quickly and easily test out their games on a mobile platform. It extends the Game window by adding a dropdown that allows the user to switch between the Game view and a newly-added Simulator view.

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creating a farming rpg harvest moon part 8

Creating a Farming RPG (like Harvest Moon) in Unity — Part 8: Regrowing and Wilting Crops

Ever wanted to create a game like Harvest Moon in Unity? Check out Part 8 of our guide here, where we go through how to make crops that can be harvested multiple times, along with a system that allows for them to die. You can also find Part 7 of our guide here, where we went through how to grow and harvest crops.

A link to a package containing the project files up to Part 8 of this tutorial series can also be found at the end of this article, exclusive to Patreon supporters only.

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Fixing a jittery camera in Unity
Screenshot from Cobalt Blue, a game currently in development.

Fix jittery camera movement in Unity with Rigidbody Interpolate

If you’ve got a player character in your game that derives its movement from a Rigidbody or Rigidbody2D component in Unity, and you write a script to make your camera follow it, you will likely see jittering in your camera movement.

Here’s an example:

Camera jitter in Unity
It’s not very noticeable if you don’t move at high speeds.
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Importing CSV files into a MySQL table

Importing a CSV file into an SQL table

CSV stands for Comma-Separated Values, and CSV files are text files that look something like this:

example.csv

Username,Email,Address,Contact
johndoe,john@example.com,"71 Pickering Street, Singapore, Singapore",+65-91234567
janedoe,jane@website.com,"24 Raffles Lane, Singapore, Singapore",+65-81234567
marysmith,mary@smith.com,"83 Riveting Road, Singapore, Singapore",+65-97654321
bobsmith,bob@smith.com,"84 Riveting Road, Singapore, Singapore",+65-87654321

Essentially, the CSV file format is meant to represent tabular data. The above CSV file represents the following table:

UsernameEmailAddressContact
johndoejohn@example.com71 Pickering Street, Singapore, Singapore+65-91234567
janedoejane@website.com24 Raffles Lane, Singapore, Singapore+65-81234567
marysmith mary@smith.com 83 Riveting Road, Singapore, Singapore +65-97654321
bobsmith bob@smith.com 84 Riveting Road, Singapore, Singapore +65-87654321

Due to their tabular nature, data in a CSV file can very easily be imported into and stored in an SQL table. The commands to do that, however, are not very well-documented online.

If a CSV file does not open as a text file on your computer, that’s because your computer is opening the file with a spreadsheet program such as Microsoft Excel. In such a case, to see the file as text, you will want to open these files on a text editing software such as Notepad.

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Python in XAMPP

Running Python in XAMPP

Are you looking to run Python as a server-side scripting language on your XAMPP installation? Here’s a guide on how to set it up.

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Creating a Farming RPG (like Harvest Moon) in Unity — Part 7: Growing and Harvesting Crops

Creating a Farming RPG (like Harvest Moon) in Unity — Part 7: Growing and Harvesting Crops

Ever wanted to create a game like Harvest Moon in Unity? Check out Part 7 of our guide here, where we go through how to grow and harvest crops. You can also find Part 6 of our guide here, where we went through how to create an in-game time management system.

A link to a package containing the project files up to Part 7 of this tutorial series can also be found at the end of this article, exclusive to Patreon supporters only.

Continue reading