OP here. Company I work for recently changed names (and thus domains). This article was a godsend in realizing how important the old domain name still is. Thought I'd share!
Null MX should really be top of the list - this was what was least known for us as well.
It is not necessarily mentioned in the article, but what became apparent while reading it (for us) is really what a long-term commitment a single domain name can be. Even though my company switched names, I think they will have to keep ownership of the previous domain name till... ermm.. possibly eternity?
How will the tech-priests running the future companies know to keep the domain names related to the company's name 5 changes back?
The cost paid to the domain registation service is only a small part of this equation.
Eternity might be overstated, because old accounts tied to old domains will surely lose their utility at some point and the potential for phishing goes down as the old names are forgotten by the public. Although it would be interesting to know what shenanigans can be had at Chiquita if one were to start mailing from unitedfruitcompany.com
