BillionMail v4.4 Release Notes

🌐 Outbound IP Binding

Domain-specific IP allocation
Added outbound IP binding in domain management, allowing assignment of dedicated sending IPs for different domains when the server has multiple outbound IP addresses

Postfix configuration enhancement
Optimized relay-related settings in main.cf configuration file and ensured proper SMTP hash file existence, significantly improving email delivery stability
Security reinforcement
Removed arbitrary file read/download functionality from the interface to enhance system security protection

Database constraint resolution
Fixed foreign key constraint issues in the email_tasks table that caused database operation exceptions
Reverse proxy compatibility
Corrected reverse proxy configuration to ensure proper functionality when bypassing language detection and accessing test APIs, with improved handling of reverse proxy website abnormalities
SSL certificate maintenance
Fixed Let's Encrypt certificate automatic renewal failure issue