Re: Make smtpd/Postscreen compatible with load balancers
> Non-production release postfix-2.10-20120617-nonprod has supportAfter another week of testing, this is now released as a regular
> for up-stream proxy agents in postscreen(8) and smtpd(8).
> To enable, specify one of:
> postscreen_upstream_proxy_protocol = haproxy
> smtpd_upstream_proxy_protocol = haproxy
> haproxy is not the only proxy agent that works with Postfix. Support
> for nginx with proxied SASL authentication is available in Postfix
> 2.9 smtpd(8). This uses the XCLIENT protocol.
development release postfix-2.10-20120625.