ZOHO Campaigns Emails

ZOHO Campaigns Emails

Hello,

As of Tuesday of this week none of my campaign previews are getting to my outlook inbox. When it asks you to send a "test campaign" I type in my proper email and it always shows up in my outlook email inbox moments later. This week it is not working at all. Nothing is showing up in my inbox. I have tried several times each day. This has never been a problem for me before. Please assist. 

Kate