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A comment on Check If Email Exists. Parent comment

Re:Check If Email Exists by spondyl on Thursday July 01, 2021 @09:52PM (#27707084)
Personally, I do this kind of thing manually if I want to send some positive feedback to people who work at companies I like, but they don't have any obvious emails published.

A recent example was the CEO of Evernote for the work put in to their behind the scenes series although I don't expect anyone to read it of course. People are busy!

I wrote a bit about it here: https://utf9k.net/blog/email-lookup/

Now does this scale? Not at all and I haven't read the email spec or anything like that. It's also handy in a pinch if you wrote down an email but can't remember if it's spelled correctly or not.

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Re:Check If Email Exists by mattowen_uk on Friday July 02, 2021 @01:02AM (#27707963)
The non-interactive nslookup for Windows invocation:

  nslookup -query=mx evernote.com
Edit: Trying out the macOS/Linux invocation on Windows also works:

  nslookup -q=mx evernote.com
Oddly, the first time I did this, I only got IPv4 results, subsequent queries for the same domain, included IPv6 as well.
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