Here are a few resources that will hopefully help:
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From the blog: Deliverability 101
I made this mistake early on which could apply to you: I started sending a ton of emails from a brand new domain, and was wondering why my emails kept going to spam. It turns out that you need to... (More)
ChatFrom the blog: How to Build Your Email Marketing FunnelFrom the blog: How to Get More Email Subscribers for Your ListFrom the blog: Deliverability 101New in ConvertKitSeptember Challenge