Thanks for reaching out because we know how important it is for your contacts to receive your email campaigns! When valid email addresses Bounce, it's important to remember that Constant Contact bases this information on response codes from the receiving email server. And when numerous subscribers from the same large ISP (such as @maine.rr.com) bounce in your account, it's best to work with our ISP Relations Team so we can resolve the problem on your behalf. Please feel free to reach out to a Deliverability Specialist directly so we can help!
Nichelle M Community & Social Media Support
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