Are you sending your marketing emails and newsletters too often? You may want to keep updating subscribers about the latest products in your store or you may want to inform them about daily deals and offers. But that doesn’t mean you keep spamming their inboxes with marketing emails.
Limit yourself to one email a day at the max. And even if you do send out daily emails by default, make it easy for recipients to customise their email preferences. Instead of limiting the options to only an “unsubscribe” button, give them the freedom to choose how often they receive emails from you.