Beginning approximately November 2019, we began seeing a huge spike in bounce rates. Where previously they had hovered in the 2-4% range. Now we are consistently seeing rates in the 20-30% -- even going as high as 89% in some campaigns.
Drilling into the data, the spike seems solely due to excessive "Other" bounces. Rates for Undeliverables, Non-existent and Blocked are pretty much unchanged.
Any idea why the sudden surge? Is is a reporting error? A reporting process change? An external factor like CCPA?
There has to be some kind of explanation.
Thank you for reaching out to the Community about your email campaigns! I can understand how important it is for your emails to successfully deliver to your contacts. I apologize you are seeing high bounces rates like the ones you have described. With that said, your campaign with a high percentage of 81% is due to a small sending list. However other campaigns with a large bounce rate do not seem to have common factors like a specific domain. Because of this I would suggest calling into our Deliverability Specialists directly. These support agents can help look further into these campaigns or any other contacts that may be bouncing in your account.