I started my emails recently with Zoho Mail (Super Admin- director@samcoirproducts.com) and immediately found a problem of my emails not being received by the other end. All the corporate emails were not being sent to the other side. When being check it says that the email has been black listed. I made the email like 2 days ago and I just sent an email to my contacts saying I have changed the email but most of them haven't been delivered. 

Please be kind enough to attend to this as this is an urgent matter.

Thank you.