OK, if you do that, I won't open any links in any emails from itdepartment@example.com, where itdepartment@example.com is the group email of my company's IT dep

OK, if you do that, I won't open any links in any emails from itdepartment@example.com, where itdepartment@example.com is the group email of my company's IT department. I may or may not open any emails from that address period, depending on how paranoid I'm feeling. Or... and catch me if I'm talking crazy here... or do you want to fix the email software so I can trust that only the IT department can send me emails from itdepartment@example.com which actually make it through the firewall and email filtering software and internal email security policy to reach my email account?