Nothing is wrong. With new accounts sending their first large campaigns we always check the messages for SPAM compliance and general formatting quality. If your message passes quality control it will be sent within 30 mins (AEST Business Hours) of queuing. If your message has been queued outside of business hours (BH) it will be reviewed the next morning.
If you need it sent quicker please email email@example.com and we will send it as soon as we can.
Once you are sending messages compliantly, generally no future verification is required.