October 1, 2023

Explaining Email Protocols: POP, IMAP, Dovecot, Maildir, Fetchmail, Procmail, Catchall

I’ve gone over the details of how a mail server or SMTP server works in this video. Email protocols and technologies such as POP, IMAP, Dovecot, Maildir, Fetchmail, Procmail, and Catchall were explained.

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.

I explained several tools and terminologies connected to Email and Email Servers in this video. I’ve explained the concept of Fetchmail, the Mail Retrieving Agent, and Procmail, the Local Delivery Agent with Scripting Support. Dovecot the POP/IMAP Server, POP or Post Office Protocol, IMAP or Internet Message Access Protocol and the differences between POP and IMAP, and ultimately the email Mailbox format and the differences between Mbox and Maildir Format.


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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