Is 'Batch and Blast' Your E-Mail Strategy?

Lately I've heard a number of B-to-B catalogers complain about falling e-mail response rates and rising unsubscribe rates. It very quickly comes to light that, for the most part, they're following a “batch and blast” e-mail strategy. They form an offer and send it to their entire e-mail lists. No B-to-B cataloger I've ever met has a completely homogeneous customer file. In fact, it's quite the contrary: They all have groups of customers from different segments who want and need to be treated differently.