$devart is the account that the deviantART computer system uses to send automated notes to users in response to certain actions taken by staff, such as removal of a deviation. The Copyright and Etiquette Administration (CEA) is the team that handles deviation violations, so it would be one of them who triggered the message to be sent.
Think that's bad? I got one of my comments hidden by a mod (I'm assuming the same one who did absolutely nothing when she was assigned to all three of my reports about the person I'm getting ready to tell you about) because I was calling him out for bugging me and my friends, and not to mention someone filled me in on his past, he had some rather fucked-up images in his gallery. He was . Thankfully he got justice served though.