non-existent bounces

I am getting email addresses labeled as non-existent, when I know they are correct emails, and they exist. I also know that the are connected with coworkers, and we have a new email screening service that might be blocking our constant contact emails. how can i make sure these emails dont get labeled as non-existent, and make sure they get delivered?

1 reply
Webinar

Join us to learn about successful email lists, from onboarding to database maintenance. May 28, 2026 - 2:00 pm ET

Popular Posts:

The world's largest virtual email marketing conference. November 12-13th.