Is mail.domain.com considered a subdomain name

Yes, mail.domain.com is considered a subdomain name.

A subdomain is a domain that is part of a larger domain, and is typically used to identify a specific service or section within a larger domain. In this case, mail is a subdomain of domain.com.

Here's a breakdown of the components:

• domain.com is the top-level domain (TLD)
• mail is the subdomain
• mail.domain.com is the fully qualified domain name (FQDN)

Other examples of subdomains include:

• blog.example.com
• store.example.com
• support.example.com

Subdomains are often used to organize and categorize different services or sections within a larger domain, making it easier to manage and maintain the domain's infrastructure.