________________________________ From: Kazuho Oku <kazuhooku@gmail.com> Sent: Friday, October 17, 2025 12:28 AM ... > On this point, RFC 9110 allows intermediaries to buffer messages until they are complete [1]. Yes, and evidently some gateways do this. But we are having this conversation because in practice that behavior isn't good enough. Many gateways today never buffer message content, because they know that some of the messages need incremental forwarding, but they don't know which ones. Adding "Incremental: ?1" doesn't fix this, so those intermediaries can't do anything useful with the "Incremental" header unless it has specified "?0" semantics. --Ben
Received on Friday, 17 October 2025 14:02:05 UTC