+.im &{lib}/man/retry.im
+
+&h2(PAYLOAD SIZE)
+When crafting a response based on a received message, the user application must
+take care not to write more bytes to the message payload than the allocated message
+has.
+In the case of a received message, it is possible that the response needs to be
+larger than the payload associated with the inbound message.
+In order to use the return to sender function, the source information in the original
+message must be present in the response; information which cannot be added to a
+message buffer allocated through the standard RMR allocation function.
+To allocate a buffer with a larger payload, and which retains the necessary sender
+data needed by this function, the &ital(rmr_realloc_payload()) function must be
+used to extend the payload to a size suitable for the response.