Email Verification & Clean Up
It's a good idea to regularly clean your email list to improve deliverability.
Email bounce rates determine how many people see your emails. Internet regulators (such as ISPs and anti-spam groups) set limits for bounces, spam complaints, and unsubscribe requests. If you send campaigns to inactive users and exceed these benchmarks, you will show up lower in inboxes and could even have your account suspended by your ESP.
Use email verification tools to safeguard your score and even reduce your marketing bills.
It is worth sending a series of test e-mails from the test server before the campaign.