Höhere Empfängergruppen führen zu niedrigeren Öffnungs- und Klickraten — das zumindest meint ExactTarget, wie MarketingVox berichtet:
Lists with 100,000 or more names had an average open rate of 18.2 percent and click-though of 3.6 percent. Those with 101–1,000 names had an open rate of 42.1 percent and click-through rate of 6.8 percent.
MarketingVox: ExactTarget: Smaller Email Lists Perform Better
