We recently moved from Mailchimp to Zoho Campaigns and copied all the email lists. Now I just sent an email campaign which got an open rate of 16,7%. This is of itself not bad of course, but we had opening rates of 25% to 30% in Mailchimp before, with the exact same mail adresses. We have improved upon content and design, so I don't understand exactly why our open rate is so much lower. Do you have some insight or advice on how we can improve our open rates?

I thought that maybe this was because of spam, that more of our emails now end up in spam. So I wanted to check that in the statistics, but I can't seem to find this information. Do you have this kind of information somewhere, and if so, where can I find it? (I found the bounces, but those emails do not end up in spam mailboxes, but are not delivered - if I understood correctly)

Thanks in advance for your insights and help!