Thanks Sanford. I also checked another instance of Marketo of ours and it is working fine as well. Coincidentally I just got this reply from Marketo support:
Looking into this further for you, this looks to be a server wide issue for the server hosting your Marketo instance, and an engineering ticket is currently open for this issue. I have attached this case to the engineering ticket, and Marketo engineers are working on a fix as I type this. |
Looks like we lost on a high-stakes game of server roulette. Thank goodness I pulled the plug on a large email send scheduled for this afternoon.
I appreciate the help everyone was able to provide, looks like the case is closed on this one.