I got a mail from the Stack Exchange Travel Site that I am one of the top users this month.
In the email, I saw:
Email us directly at [email protected] any time
Why are they putting
@stackoverflow.com there instead of
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The company is still branded Stack Overflow, although the official company name is Stack Exchange Inc..
They've used the Stack Exchange brand for a while, but in 2015 they reverted to Stack Overflow again. In all that time, the email addresses never changed. They still use the same domain as that they did on day 1, when there was just Stack Overflow.