Top Level Domain (TLD)

A Top Level Domain (TLD) is the last segment of a domain name, representing the highest level in the domain name system. It typically consists of two or more letters and indicates the purpose or geographical location of a website or entity. Examples include .com, .org, and .net. TLDs help categorize and organize websites on the internet, facilitating easy navigation and identification.

What are typical popular TLDs and their envisioned use case?

Here is a list of some typical Top Level Domains (TLDs) and their envisioned use cases:

• .com - commercial/business websites
• .org - non-profit organizations
• .net - network infrastructure or service providers
• .gov - government entities
• .edu - educational institutions
• .mil - military organizations
• .int - international organizations
• .io - technology and startup companies
• .info - informational websites
• .biz - business-related websites
• .co - country-specific or company-specific websites
• .uk - United Kingdom
• .ca - Canada
• .de - Germany
• .jp - Japan
• .fr - France
• .cn - China

Please note that this list is not exhaustive, as there are numerous TLDs available, including country-specific domains and newer generic TLDs.

Is there a list of mail relevant TLDs?

Spamhaus has a list of The World's Most Abused TLDs which you can find here: Spamhaus: The World’s Most Abused TLDs.

What is a good TLD for a mail server domain?

This is dependent on the use case you have. We recommend using customer domains for single mail systems of a company. If you want to run a general purpose with hundreds or even thousands of clients, then .net or .com are a good choice, as they have a great reputation for mail systems.

If you do stupid things or abuse a domain for spam, your system will get in trouble independent of the domain or TLD your systems are setup on.