Deliverability refers to the ability of your emails to successfully land in your contacts’ inboxes, thereby avoiding the spam folder or being filtered out beforehand.
Email service providers have implemented systems to protect users by filtering unwanted messages based on certain criteria. You must therefore know what email providers expect from you as a sender and demonstrate to them that your emails are legitimate, so that your emails arrive in your contacts’ primary inbox.
As a newsletter tool provider, it is our responsibility to ensure that all emails sent by our clients successfully reach their recipients.