Spam Resource: DELIVTERMS: FQDN

Al Iverson just shared another insightful blog on Spam Resource:

Today, let’s define the term “fully qualified domain name,” aka FQDN.It can seem like a bit of a complicated term for a simple thing. What’s an FQDN? It’s a whole internet address. Sometimes it might be called a subdomain (I’m guilty of this), or an internet hostname. Think of it as the server name or host name + the domain name. For www.spamresource.com, www would be the hostname or server name, and then spamresource.com is the domain name. So www.spamresource.com is an FQDN, a fully qualified domain name.If somebody asks you if you have a DMARC record for the FQDN email.spamresource.com, you would specifically enter “email.spamresource.com” in a DMARC record lookup tool. This could be called checking for a DMARC record at the FQDN level or at the subdomain level.In the case of sending from a subdomain, like email.spamresource.com, that subdomain would also be considered an FQDN, for purposes of

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