Load balancing makes debugging mail issues harder because logs are split across multiple servers.
Would you like specific configuration examples for HAProxy, Postfix, or AWS Network Load Balancer with SMTP? how to load balance smtp
Here is a conceptual configuration snippet for HAProxy balancing SMTP: Load balancing makes debugging mail issues harder because
It uses the IP address and port to route traffic to backend servers without inspecting the email content. making management impossible.
Loading balancing SMTP (Simple Mail Transfer Protocol) is more complex than load balancing HTTP because SMTP is stateful and stores data (emails) on disk. You cannot simply round-robin traffic to multiple servers without a shared storage strategy, or emails will end up scattered across different servers, making management impossible.