alt Hacker News"Loud noises and flash bright red lights" is an industry- and regulations-accepted transport layer for a life-or-death signal.
Email is not.
"Loud noises and flash bright red lights" is an industry- and regulations-accepted transport layer for a life-or-death signal.
Email is not.
"Loud noises and flash bright red lights" is an industry- and regulations-accepted transport layer
And yet, still not "guaranteed," which was the criteria specified by the OP.