We’ve written extensively on the importance of verifying your emails to improve deliverability and protect your sender reputation. The bottom line is that you need to clean your email list periodically to ensure you’re sending to real people.
The best way to identify and remove invalid emails is to use email validation tools like MailerCheck that can improve your deliverability rate by up to 98%.
As a bonus, MailerCheck also categorizes your email addresses to find potential issues such as syntax errors or full inboxes. With these insights, you can optimize your lists and improve your metrics even further.