Digital Ocean blocking port 25

Okay, so is this just a default setting as part of their Ubuntu image, or is this at the level of their virtualization software? That is, can we control it as part of the image we are handed, or do they control the firewall setting?

Also, should we look into banding together and telling Digital Ocean how many customers they will lose if they do not reverse their decision?

EDIT: appears that this is why I have been having outbound email problems for a few weeks now. I’m going to be pissed if this is the result of Digital Ocean’s chinanogins.