Email providers look for a number of factors when deciding whether to automatically send your emails to spam. If you’ve made it on an email blacklist, that means you’ve repeatedly sent emails to recipients who haven’t signed up for your email list.
Single opt-in maximizes list growth in exchange for taking on higher deliverability risks, while double opt-in minimizes deliverability risks in exchange for slower list growth.
We have certain requirements all of our users must follow, and recommend some best practices that you can keep your audience well and productive.
