I have created one workflow from the Zoho campaign.  The are 4 different emails scheduled to send accordingly over a time frame. But I notice all the emails are going to the spam folder, 

In Gmail I have checked the message. It shows that  "Why is this message in spam? Lots of messages from mail2.zgpm.zcsend.in were identified as spam in the past."

SPF record is under spam??? Need help ASAP.