0.35% of all e-mails sent resulted in a sale

Order-per-email rates reached a new high of 0.35% in Q4 2004, up from the previous high of 0.3% in Q2 2003, DoubleClick reported. Click-to-purchase conversion rates in e-mail marketing campaigns increased 14% YTY in Q4 2004, from 4.2 to 4.8%. As e-mail volume rose, however, the average revenue per e-mail remained at 26 cents, which resulted in an 11% YTY decline in average order size to $89.