Optonline email addresses bounced


Optonline email addresses bounced

I have noticed that all my optonline.net email addresses have been bounced IN THE PAST 2 WEEKS ONLY  before that they went through fine, can you help me understand why please



RobinS574 Hello and thank you for reaching out to the Community!  If all the contacts with that domain (@optonline.net) are bouncing, there could be something on their end blocking your campaigns from going through. This could have happened due to a change or update on their network. You’ll want to make sure Constant Contact is still Whitelisted as a safe sender for their domain. If you still need assistance in this matter you can also reach out to our team in Deliverability.

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