[exim] HAProxy SMTP Proxy Protocol

All,

Is anyone using this in anger yet ??? Been doing some testing and most
of the time it works ok but there are occasions when 'Proxy Negotiation'
fails, give the ha proxy VM a quick reboot and starts working again .
which is kinda strange.

Also it seems that when negiotiating does fail its a permenant error -
so messages get rejected and bounced rather than deferred .. is this
correct - is there a way to change that ???

rgds

Matt B.