[toddh]

Usually there's a corporate email address for internal email. Does all godaddy internal email come from godaddy.com? That would be strange.

[tsimionescu]

The email in my company all comes from @<company-name>.com. Why would a company keep a separate domain for internal vs external email? Is that common practice?

[michaelt]

It's rare but not unknown - for example Facebook employees' e-mails are [e-mail] rather than [e-mail] and sometimes facebook send e-mails from [e-mail] ¯\_(ツ)_/¯

[terinjokes]

Facebook's case is likely because they launched a public email service back in 2010.

[the_jeremy]

It's not internal vs external, it's employee vs users (e.g., @google.com vs @gmail.com)

[superseeplus]

That’s an excellent point. Yahoo uses yahoo.com for their public email service. Google uses google.com for their internal (employee) email addresses.

[Macha]

Yahoo consequently does not use yahoo.com for internal email addresses. Even before all the merger activity