A client of ours has asked us to supress an entire domain from all future emails. Is this possible with Campaign Monitor? The trouble is that they keep supplying new CRM data which will always include the domain. Their internal system can't remove them automatically so it's down to us!
I'm afraid that isn't possible. You're only able to suppress individual addresses. If you're importing files you could do a search for that domain first and manually delete them before importing.