We have solid reputation, not a new sender and volumes are upto 2M. It happens randomly to some deliveries where the delivery rate goes down to 70-80% from 95%. Any advice here would be helpful. Thank you for the chat. Have a good day.

I have experienced these very randomly and I send large volumes using wave feature but that hasn't been much of help. If the cause is the limitation on receiving mail server, does that mean we have to manually throttle the volume for such domains. Any other to way to control that in AC ? 

Could you please help me understand the reason behind MomenCode_24 Timeout errors. How to avoid these errors ?

Hi @tarobert , How to handle deliverability in B2B space where most of the contacts have custom email domain and different orgs use different filtering services like Mimecast, Proofpoint etc as well.