Today in "Fun with Data," I present to you a link to a downloadable list containing the top Yahoo Mail email domains. Why would you need this? Maybe you run some certain mail server (MTA -- mail transfer agent) software that can't group domains based on MX. Maybe you'd like to roll up your subscriber data based on domain to determine what percentage of your subscribers' mailboxes are at Yahoo. Or maybe you're just a nerd like me who thinks domain MX data provides an interesting snapshot into who hosts what mail for which domains.
I've categorized domains thusly:
Yahoo Mail: Domains that appear to host mail for Yahoo Mail subscribers.
Customer Domain: Domains of Yahoo customers who have likely paid Yahoo to host email for their domains. (This will is far from complete; there's no way I can tell every domain with mail hosted by Yahoo.)
Yahoo Corporate: Brands and companies seemingly owned by Yahoo.
No Mail: A few domains have a "nomail.yahoo.com" MX record or similar, suggesting that they accept no inbound email.
This data is sourced starting from online lists of the top one million and top ten million domains, combined with a dash of my own knowledge and historical tracking of Yahoo domains over time.
As I measure this by where a domain's MX record points, there could be a few random "garbage domains" in here, where somebody has misconfigured their domain's MX record in DNS to point at one of these MXes, even though Yahoo does not accept mail for that domain.
Yahoo Mail hosts mailboxes for a few other current or former mailbox providers/internet service providers:
AOL: AOL and Yahoo are the same entity nowadays. (They have slightly different MX records and slightly different webmail interfaces, but it's the same company.
Verizon: Verizon owned Yahoo for a time, then later sold it. Verizon subscriber mailboxes remain hosted by Yahoo Mail after the spin out.
Cox: As noted previously, Yahoo Mail now hosts mailboxes for subscribers of Cox cable broadband.
AT&T: Sort of. AT&T domains are not included in this list; as the gateway MX servers are not Yahoo, but are hosted by AT&T. The mail then lands in Yahoo Mail-hosted webmail, and that's where AT&T users access it.
Today in "Fun with Data," I present to you a link to a downloadable list containing the top Yahoo Mail email domains. Why would you need this? Maybe you run some certain mail server (MTA -- mail transfer agent) software that can't group domains based on MX. Maybe you'd like to roll up your subscriber data based on domain to determine what percentage of your subscribers' mailboxes are at Yahoo. Or maybe you're just a nerd like me who thinks domain MX data provides an interesting snapshot into who hosts what mail for which domains.
I've categorized domains thusly:
This data is sourced starting from online lists of the top one million and top ten million domains, combined with a dash of my own knowledge and historical tracking of Yahoo domains over time.
As I measure this by where a domain's MX record points, there could be a few random "garbage domains" in here, where somebody has misconfigured their domain's MX record in DNS to point at one of these MXes, even though Yahoo does not accept mail for that domain.
Yahoo Mail hosts mailboxes for a few other current or former mailbox providers/internet service providers:
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