Haproxy - HillLiu/docker-postfix-sasl-dkim GitHub Wiki Table of Contents postfix sample health check smtpchk alternative parameters explain postfix sample https://www.haproxy.com/blog/efficient-smtp-relay-infrastructure-with-postfix-and-load-balancers/#haproxy health check https://www.haproxy.com/documentation/aloha/10-0/traffic-management/lb-layer7/health-checks/ smtpchk alternative https://github.com/haraka/Haraka/issues/2445#issuecomment-443830842 parameters explain https://www.cnblogs.com/dkblog/archive/2012/03/13/2393321.html ⚠️ **GitHub.com Fallback** ⚠️