Is there a way to avoid emails going into spam folders?

I don't think so.

There are a few things that you can do to ensure your email don't go to the spam 1. Copy - Makes sure you don't have content that trigger the spam filter. There are multiple sites on the internet that help you find these words 2. Setting DKIM & SPF records 3. Email readability - image to text ratio, background colour to text colour contrast Having said that, Zoho's campaigns are know to hit spam more often than not. We've tried the same content with multiple providers including mailchimp and have seen that the ones sent from Zoho campaigns hit spam more often than not.