@futurebird their emails are generally batched up & sent via #NASA mail servers, and any web browsing opportunities will go through NASA proxies, so it could be tricky

it’s not that hard to generate a complete list of NASA mail servers & map those to back IP addresses in email headers, but that would likely only give you confidence that “someone at #JPL” emailed you – and if they used their NASA email address then it’s much easier to map the IPs from their email headers (back to a specific NASA mail server but it might not be specific enough to give you confidence that they were in space when they sent it 🙃)

the same technique can probably get you a reasonable subset of NASA proxy servers, but it might be difficult to map those proxies back to specific NASA orgs or business units - you’re unlikely to get any IPs in your web server logs that resolve back to (e.g.) integrity.orion.artemis.proxy.jpl.nasa[.]gov… 😜