Sendmail is still the number 1 MTA (mail transfer agent) in use today, followed by Postfix, while Qmail is a distant third. The Linux sendmail and dovecot are highly customizable packages that allow Server Administrators to configure the mail server according to the requirements of each organization.
In this video I used CentOS 8, which is similar to RHEL, to demonstrate some of the functionalities of both sendmail and dovecot packages. For DNS server, we used the previous Windows Server 2019 with the sanuja.local domain.
A detailed demonstration of how to disable firewall and SELinux: https://youtu.be/IiqO5VN5e58
Please be advised some of the network configurations done here are specific to my lab environment on VMware Workstation Pro 16. However, the Network Systems and Server Administration fundamentals remain independent of the specific configurations.
00:00 – Intro (disable firewall and SELinux)
00:50 – Installing sendmail and dovecot. Setup lab network configuration.
09:08 – CentOS server basic setup
12:23 – sendmail configurations
20:50 – DNS server setup (Windows Server 2019)
27:52 – Editing the sendmail configurations
32:22 – Editing the dovecot configurations
40:54 – Windows 11 Professional end client setup*
*Please note this setup is a bit more specific to my lab environment. Modify the steps according to your local network configurations.