Hello - our Marketing team has reported, on two separate occasions, of issues where they saw that email campaigns were not sending/going out, and list imports are either stalling or not completing at all. I have worked with our Marketing team to identify how they are alerted to these issues, and they have reported that they have found these issues randomly, through their own manual checking. I have also asked Marketo Support if there is any way we can proactively monitor/be alerted to when these issues come up again going forward, and they let me know there are no tools on their end to do so.