Sending Email with SMTP

After selecting the list of (10,000 subscribers) & select send newsletter. Sendy shows Your email is on its way. "Your campaign is now sending!".

When clicked all campaign, campaign shows up in drafts & is ready to send. When checked at the SMTP no emails were found in Mail Queue. (SMTP Server is a WHM/cPanel VPS Server)

Test Email is working fine when sent to myself.

Thanks in advance.