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Can an email go 500 miles in 2025?


can an email go 500 miles in 2025? Once upon a time, there was a university president who couldn’t send an email more than 500 miles, and the wise sysadmin said that’s not possible, so the president said come to my office, and lo and behold, the emails stopped before going 500 miles. Has technology improved? Can we send an email farther than 500 miles in 2025? There’s a lot to the story that’s obviously made up, but if we fix the details so that it can happen, we can reproduce it.

Enough time to make a quick roundtrip even at half c. poll or select with a zero timeout returns immediately, so not much chance of finishing the connection before that happens. We’re not going to try sending an email with sendmail because I don’t want to wait three days while the message sits in the retry queue before failing. The 500 mile limit for perfectly misconfigured servers is still in place, but good luck trying to determine which domains are accessible using a roadmap.

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