No, the one I'm thinking of is vBulletin4. I am an admin, but the site is owned by a company who do all the maintenance. Suddenly many issues have started a few days ago, but the "IT team" seems to have gone awol. There was no reconfiguration of anything, so what I suspect is they updated the PHP and this has caused all the issues with vB 4.2.3
I have admin access, except I cannot login to ACP because I have a new IP and have to verify, but guess what? One of the issues is no email notifications are getting sent.
Knowing the answer won't mean I can fix anything, just more out of curiosity.