October 1, 2023

Inbound/Outbound Spam Filter, DNS Round Robin, Backup MX, SMTP Relay Authentication, SMTP Load Balancer

I explained the Email Server in this video. Inbound and outbound spam filters, DNS RR or DNS Round Robin, Primary and Backup MX, SMTP Authentication, and SMTP Load Balancer have all been discussed.

To learn How an Email Server or SMTP server works. We must first learn about Email Protocols or SMTP Protocols. Otherwise, we won’t be able to understand the email working process. SMTP Protocol conversation between two SMTP servers illustrates how email works step by step. The Email Protocols are used before and after email is sent and received by the SMTP Server.

Here, I have described
(1) The Inbound Spam Filter, which scans inbound emails and delivers to the internal email server.
(2) The Outbound Spam Filter, which scans outbound emails and delivers to the internet.
(3) DNS Round Robin, which chooses mail server IP from a pool of multiple IPs. it is used for Inbound mail load balancing.
(4) Primary and Backup MX, this is for inbound email server failover, if the primary server goes offline then the secondary or Backup MX server receives all emails.
(5) SMTP Authentication, which is used for email relay control. When users send an email, before it is sent to the internet, they must be authenticated to see if they are allowed to send mail through the server, which is known as a relay control.
(6) SMTP Load Balancer, an SMTP load balancer is used when there is a high volume of email. It can be used for both inbound and outbound emails.

Visit Mail Server Configuration Playlist:

Visit Mail Server Design Series Playlist:

Visit Linux DNS Server Configuration Playlist:

Linux Mail Server Configurations:

Linux Mail Server Postfix Architecture: https://youtu.be/qhA8HuJBa64
Linux Mail Server Configuration Step by Step: https://youtu.be/HPV1hJsRud0
How to Configure a Subdomain Mail Server: https://youtu.be/_g5jwq68AjI
How to Configure Primary and Secondary MX: https://youtu.be/y0l9oubLpxQ
Mail Server SMTPS 465 Port with SASL and TLS: https://youtu.be/BWkdkw0cZYo

Mail Server Design and Deployment Guidelines:

How to Configure a Mail Server: https://youtu.be/cXoSdqkJKio
Incoming & Outgoing Mail Server: https://youtu.be/eOZ19VSIvpQ
Primary and Backup Mail Server: https://youtu.be/UitGGBuiXZ0
Incoming Mail Server Load Balancing: https://youtu.be/4Vaa6ZRMePU
Outgoing Mail Server Load Balancing: https://youtu.be/3YBzSqM7fgM
Incoming Spam Filter Deployment: https://youtu.be/XFzCO-uvEwA

Linux DNS Server Configurations:

Install and Configure Linux DNS Server: https://youtu.be/FeZjRF-aVlc
Primary DNS Or Master DNS Server Configuration: https://youtu.be/fb41xuax8xU
Secondary DNS Or Slave DNS Server Configuration: https://youtu.be/jygerYi-Ytk
Caching DNS Server Configuration: https://youtu.be/y_PUUwY0vwc
DNS Forwarder Configuration with Caching DNS: https://youtu.be/nDJ8WsXYtMs
Forward Zone Configuration For DNS Forward Lookup: https://youtu.be/4ghXAJvI-t4
Reverse DNS Configuration For DNS Reverse Lookup: https://youtu.be/ButSB33dXtA
DNS Records A, PTR, CNAME, NS, MX, SOA, TXT: https://youtu.be/tpQReHosCD4

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