Hoping to get more insight on this. 

Our emails sent to clients from ZOHO CRM directly from inside the module have a shockingly poor open rate. 

When using Yesware for Gmail from our Gmail / company domain they seemed to be opened much more. 

What is going on here? Bad sending reputation?

Zoho campaigns- mass email marketing module, slightly worse than our successes in Mailchimp and other providers. 

If you have similar experiences please share your solutions.