Geeky insider joke embedded in 1and1 email

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 <a href="http://en.wikipedia.org/wiki/Home_Improvement_%28TV_series%29#Running_gags">Binford 6100 tools</a>.