Email sending very slow today...

Email sending very slow today...

We had a campaign scheduled to send today at 10 AM EDT.  As of now (3.5 hours later), it is only 40% complete sending.  Normally, it would be complete in under an hour.  What is going on?

In addition, when using the Zoho Campaigns website yesterday, the website was very very slow.  After I would edit content and press save, it would some times take minutes to complete saving.

Any thoughts?  This is one of the most important email blasts of the year for our company, and at the rate it is going, it will not be complete before the end of the business day.