So I was testing some updates to Fwd:Vault’s mail processing logic today, and I was using a billing message I received from 1&1. While tracking down a bug, I noticed a fantastic header line in the raw message:
[...] Message-Id: <357619014-200908300000M9422000.7395000$357600000@GB.billing.1and1.com> X-Billing-Backreference: 357619014-200908300000@@9420000.7395000.357600000 X-Binford: 6100 (more power) [...]
Let’s hope it’s more stable than Tim Taylor’s usual fare of Binford 6100 tools.