Content Filtering if URL doesnt match, possible?

We have been getting alot of spam coming in that is getting past the spam filter. Alot of the links in the emails are compromised sharepoint sites. EG: https://allsStartiling-my.sharepoint.com/personal/... fdf594cca&authkey=AcAi2FDSFDSFDSFDSFdfo&e=0e155fba325sgfs3r2ff333f3f3a44f Is there a way to put in a filter so if the sharepoint site doesnt match our companys EG: https://MyCOmpany.sharepoint.com/*************, it will be quarantined?