On Thu, Nov 18, 2010 at 01:15:24PM -0500, Victor Duchovni wrote: > On Thu, Nov 18, 2010 at 06:03:26PM +0000, Chris G wrote: > > > E.g. I want messages from postmaster/root/cron on my dps server to be > > distinguishable from similar messages from the server called mws. > > http://www.postfix.org/MULTI_INSTANCE_README.html#quick > > > This means (I think) that I want to set the myorigin parameter to the > > machine's name on the LAN (e.g. dps.zbmc.eu or mws.zbmc.eu). This is > > how I have things set at the moment. > > > > However for mail going to the outside world (which does get sent from > > mws.zbmc.eu in particular) I think myorigin should be zbmc.eu as that is > > how the outside world sees my systems. In addition, having myorigin set > > to dps.zbmc.eu, mws.zbmc.eu, chris.zbmc.eu means that the mail headers > > have invalid/unknown host names in the headers as these host names only > > exist on my LAN. > > You can use internal addresses internally and map them on the way out, > or use external addresses everywhere (better I think) and deliver some > of these locally via virtual_alias_maps. > > All the tools (canonical, virtual and generic rewriting) are described > in ADDRESS_REWRITING_README.html. > > Avoid sender_canonical_maps, it is semantically wrong in most cases. > Avoid masquerading (at least for inbound mail) as it is difficult to > combine with recipient validation.
Thanks too - I'll go and have a good read. -- Chris Green
