Kerry, Bush crowd mailboxes, both real and cyber, in a push to win votes and funds.

By Paul Barbagallo

In June alone, JohnKerry.com raised $12.1 million, with an average contribution of $99. According to Eiring, of the more than 1 million opt-in e-mail subscribers, 45 percent eventually become active donors. Even those members who don’t ante up the greenbacks are valuable to the Kerry camp, simply because they’re plugged in.