Hello,

We use a tool called Xink, that allow us to add dynamic banners to promote our latest news, blog posts or future events in our employee emails.

This is working very well, and it prevent us from using zoho emails. 
I'd like to use Zoho emails, but the condition would be to be able to sync Xink with Zoho emails.

They are natively integrated with SalesForce or Zendesk as well as other mailing tools.

Thanks,