Buzz
Secure Your Mail Server: Opening Port 25 in Windows
Important Considerations
Key Steps to Follow
Procedures to Implement
For Windows Vista and Beyond
Accessing Control Panel: A Quick Guide
Navigating Windows Defender Firewall
Exploring Advanced Settings
Managing Inbound Rules
Adding a New Rule: Simple Steps
Configuring Port Selection
Specifying TCP Port 25
Customizing Connection Permissions
Managing User Access
Choosing Rule Application
Naming the Rule
Testing the Port
Windows XP
Accessing Control Panel
Accessing Windows Firewall
Navigating to Exceptions Tab
Adding a New Port
Opening Port 25
Saving Changes
Useful Tips
- If your organization employs Microsoft Exchange alongside Microsoft 365 in a hybrid deployment, ensure to open ports 443 (HTTPS) and 80 (HTTP).
- For home internet service providers, note that port 25 might be blocked. Contact your ISP if port 25 remains inaccessible despite configuration adjustments in Windows Firewall and your router.
