I just chatted this same question to a CC rep. Here's what I learned. Hope this helps!
David S: Hello Alison, thanks for coming into chat today. Understanding your bounces is important, so I'm glad you came that question. Essentially, what the 'suspended' bounce category means is that a contact was bouncing as 'non-existent' too frequently, so our system put it on a block list, meaning that we are actually not sending email to 'suspended' contacts. We do this because if we continually sent email to contacts that bounced as 'non-existent,' many major email servers and ISPs would block ALL Constant Contact email.
You: Can you tell me how many "tries" you allow before putting an email on your suspended list?
David S: Of course. So the way it works is that the first time the email bounces as 'non-existent,' we put them on a temporary quarantine for 15 days, just to ensure that if there are temporary issues with the email address, such as a server being down. After the 15 quarantine, if the contact continues to bounce as non-existent, we change their status to 'suspended.'
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