It is a fact that email marketing is tied to results, and with no results no campaign is worth it.
We offer 3 simple recommendations so you can make maintenance to your databases:
1. Keep the database up to date. After making a post, delete all bounces (or correct) and block the unsubscribe.
2. Dispose of old contacts. Working with ancient contacts can bring very bad results. The rate of delivery and the openings may be minimal and their objectives might not be fulfilled.
3. Practice segmentation. Create different segments based on openings and clicks.
And of course, grow your database continuously. Never forget the subscription form as an entry point for new subscribers.