How To Load Balance Smtp -

(for bulk sending)

backend smtp_servers balance leastconn option smtpchk server mta1 10.0.0.1:25 check server mta2 10.0.0.2:25 check how to load balance smtp

# Stick-table helps maintain connection stability for a session stick-table type ip size 200k expire 30m how to load balance smtp

A Layer 4 load balancer, such as HAProxy or Azure Load Balancer, works by distributing raw TCP connections on ports like 25, 587, or 465. how to load balance smtp