In my company spam emails are becoming a real headache. Since the number of employees is growing rapidly, the email accounts are to. We have managed to take security measures in a technical point of view(AntiSpam, Firewall etc...) but we are not doing very well in the social engineering part.
We are sending periodically emails to all the employees NOT TO CLICK LINKS COMING FROM UNKNOWN SENDERS and explaining to them the damage of the action, but it doesn't have the desired effect.
Is there a better strategy we can use to reduce maximally the clicking of these emails?