Building a Postal SMTP server to send bulk emails is a good choice for email marketers. Postal is very powerful and backed by a large community of developers. It is an open-source mail server script written in JavaScript and Ruby. It can be used to build in-house SMTP servers just like Mailgun, Sendgrid, Mailchimp, etc.
Postal installation is not very straightforward. The process is fairly complex. It’s because Postal needs several packages to be installed beforehand, it can be used. I have tried to make it as simple as possible.
Requirement for Postal SMTP server
- A domain name from Namecheap
- A VPS or cloud with a minimum of 4 GB RAM and 2 vCPU
- Operating System: Ubuntu 22.04 or Ubuntu 20.04
Initial Setup
To start with installation, you will need to connect to the server. If you are on you have to get an SSH client for this purpose. One such SSH client is Putty. But if you are on Linux or Mac, just open the terminal and type ssh@xx.x.x.xxxwhere xx.x.x.xxx is your server IP address.
First of all switch to rootuser
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sudo -i |
After that update and upgrade your Ubuntu
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apt update -y apt upgrade -y |
Next set up the hostname. Replace “example.com” with your domain name.
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hostnamectl set-hostname mail.example.com |
Updating DNS records
Login to the domain registrar and create Arecord for mail.example.com
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