I'm trying to send a campaign on behalf of a client to all of their customers with email addresses. They need to let them know that they are raising postage rates, so this isn't really a marketing campaign, but I chose to use campaigns after Bulk Email told me I'd have to split up my list of 11,000ish recipients.

This client doesn't have DKIM or a campaign domain set up, but I think they have sent campaigns of this size before. I set up the campaign and set it to execute in an hour (several tries actually), and it is still showing 0 sent on the Statistics tab with no explanation as to why it's not sending.