On Sat, Mar 10, 2012 at 01:01:00AM +1000, Nick Edwards wrote: > I have tried smtp_bind_address(6) but for some reason, although it > uses the correct IP, the relays are denied for spf failure on the > main server, even though they are all permitted in spf RR, ok, evident > by fact that if I remove the option, it works again,
As you have no control about third party DNS records, this does not help. A secondary MX is all about accepting incoming mail from the world. It have to do all policy checks. The main server can not longer do policy checks by definition for mails already accepted by the secondary, so it needs to be whitelisted. Bastian -- Each kiss is as the first. -- Miramanee, Kirk's wife, "The Paradise Syndrome", stardate 4842.6