We can’t send mail farther than 500 miles (2002)(web.mit.edu)
618 points by giancarlostoro | 104 comments
Trey Harris's classic sysadmin story about a university department that couldn't send email farther than about 500 miles, and the debugging that explained why.
![Screenshot of youtube.com: A laser pointer at 2B FPS [video]](https://hn.urlbox.com/shots/renders/2025/10/20/41ad08cb-c2b9-4d4f-b687-14f29a0ccefb.jpg)