We have been aggressive about list hygiene and removing those not opening our emails and it hasn’t impacted our deliverability. Is there another email server we can be moved to that has better deliverability?
The email servers are on a rotating ip model. There are servers with a bit better that are reserved for double opt ins so offering that opportunity to new contacts is recommended. Also, in order for your emails to have the best results (and above and beyond list hygien and content based spam rating management) you need to have SPF and DKIM not just setup on your server for your domain but specifically for infusionsoft in order for your emails to be more widely accepted by many email clients. There’s alot to deliverability but those are some of the big ones.