On Wed, Feb 10, 2021 at 05:41:49PM +0000, Chris Green wrote:
> OK, what I want to do is as follows:-
>
> I have several headless machines which need to be able to send error
> and other messages to me ch...@isbd.co.uk.
Directly to that address, or indirectly by sending mail to various local
accounts that alias to this address? If the latter, and $myorigin is
listed in $mydestination, then alias these various accounts to the
desired recipient address.
> Looking at what you say above I see the following (on one of the
> existing systems in the LAN behind zbmc.eu) :-
>
> chris$ postconf -d myorigin
> myorigin = $myhostname
Now you're reporting built-in default values ("-d" option of
"postconf"). That's not useful. I was specifically telling what the
*default* value is. If you have a non-default value you can report
it via "postconf -n".
> chris$ hostname -f
> t470.zbmc.eu
This is irrelevant.
> chris$ hostname
> t470
This shows a non-FQDN hostname.
> So one can see why (at present) I need to set 'mydomain = zbmc.eu'
> explicitly in main.cf, however I don't quite see how to change things
> so that they work how I want.
You still have not actually explained what specifically you want, but
if it is just ensuring FQDN header and envelope sender and recipient
addresses, then:
1. Make sure "myorigin" is the desired FQDN.
* You can leave at its default value of "$myhostname"
* You can set to to "$mydomain", which is inferred by
from the system hostname (with the expected result
if that's an FQDN).
* You can set it explicitly to, e.g. "someorigin.example"
2. Make sure that mydestination is either empty or lists only
$myorigin.
* If mydestination is empty, your envelope recipient address
rewriting will be via virtual_alias_maps.
* If mydestination is $myorigin, your envelope recipient address
rewriting will be via alias_maps.
In either case, your header address rewriting can be via either
or both of canonical_maps and smtp_generic_maps.
If you're setting up lots of nullclient Postfix configurations, you may
find some of the ideas in MULTI_INSTANCE_README helpful:
http://www.postfix.org/MULTI_INSTANCE_README.html#split
But get the basics working first.
--
Viktor.
