Yep, that's a scam. I've also received a message like that lately, though not from StopAdmin. My sender, MannInBlackk, got banned. It seems they get a little better in blending in.
It's like everywhere else on the internet: Don't follow every link unknown users send to you. The "effectmeds" in the address should suffice to avoid the link. There are other hints to me, but I don't want to teach the scammers.
It's sad that we've got to start being careful what links we click on here, too.