Undelivered since the last attempt
Dead Letter Protocol
Failed messages wait here for another route.
RETURN TO SENDER◆SEAL STILL INTACT◆ROUTE NOT FOUND◆SECOND ATTEMPT PENDING◆DESTINATION UNKNOWN◆ERRORS TAKE ANOTHER ROUTE◆RETURN TO SENDER◆SEAL STILL INTACT◆ROUTE NOT FOUND◆SECOND ATTEMPT PENDING◆DESTINATION UNKNOWN◆ERRORS TAKE ANOTHER ROUTE◆
Second Route
Every failure leaves a route behind. The protocol keeps the break visible, holds the message intact, and waits for a path that did not exist on the first attempt.
TickerDLQ
OriginFailed delivery
CustodyHeld without alteration
SealUnbroken
Next routeWaiting to resolve
Returned Unopened
The blue case keeps dead letters without erasing them. Inside, one sealed envelope holds its red routing tag and every unresolved intention. Nobody opens it. Nobody calls it complete. When a route reappears, the case unlocks, the address is tried again, and the error finally becomes useful.
ERRORS TAKE ANOTHER ROUTE◆DESTINATION UNKNOWN◆SECOND ATTEMPT PENDING◆ROUTE NOT FOUND◆SEAL STILL INTACT◆RETURN TO SENDER◆ERRORS TAKE ANOTHER ROUTE◆DESTINATION UNKNOWN◆SECOND ATTEMPT PENDING◆ROUTE NOT FOUND◆SEAL STILL INTACT◆RETURN TO SENDER◆
Give every error another route.