How to Spot a Bad Email List and Turn It Into a Good One
Hubspot
MAY 29, 2014
This isn’t good news: ignoring or deleting emails are also terrible for your reputation and can cause you to get caught in spam filters more often and will reduce your conversion rates. Shoot for a hard bounce rate of less than 5%. This can happen when someone has an auto-responder set or their inbox is full.
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