A lot of the viruses and Trojans today find their way into a network or a computer using emails. They come in the form of links or attachments which are always a risk for anyone especially if they don’t have the proper software to screen these files being sent via email. One good way to go about it is to set limits as far as the main email configuration server is concerned. While it may not be able to screen links in emails, attachments of any sort can be minimized.
A good way to provide manual preventive measures is through memorandums and of course lectures that IT personnel can provide to the people in an organization. Newsletters are another option, warning people of virus alerts and how they can make their way into computers.
Spreading in networks starts from one computer. These are a given. So if network and security administrators want to avoid having to address such issues, it would be best to start by safeguarding workstations and orienting people of the threat of such.
Of course, not all people will be listening to you. As far as they are concerned, it is the duty of IT personnel to block them off even before they reach the individual mailboxes. Petty as it may seem, it would be best to use all precautions necessary. While many people will not cooperate, there are measures a good IT person can do and it all starts with research and beefing up security measures through software and policy declarations.