Rosenbaum, Larry M.:
> Running RHEL 6, mail_version = 2.6.6
>
> I have a server, let's call it mail1.example.com. I want mail
> addressed to n...@example.com to be looked up in $virtual_alias_maps.
> Mail to subdomains of example.com should be relayed to a server
> by that name. The main.cf file includes the following lines:
>
> virtual_alias_domains = hash:/etc/postfix/virtual_domains relay_domains
> = $mydestination, hash:/etc/postfix/relay_domains
>
> The virtual_domains file contains example.com ok
>
> What do I need to put into the relay_domains file to allow mail
> coming from sites that aren't in $mynetworks to be relayed to
> @*.example.com? I've tried putting
>
> .example.com ok
As documented:
relay_domains (default: $mydestination)
What destination domains (and subdomains thereof) this system will
relay mail to. Subdomain matching is controlled with the par-
ent_domain_matches_subdomains parameter.
> into relay_domains but I still got "Relay access denied". If instead
> I use
>
> example.com ok
>
> then I am able to relay, but the log file has this warning:
>
> 'postfix/trivial-rewrite[19961]: warning: do not list domain
> example.com in BOTH virtual_alias_domains and relay_domains'
Right, don't do that.
> What should I be doing instead?
parent_domain_matches_subdomains (default: see postconf -d output)
What Postfix features match subdomains of "domain.tld" automatically,
instead of requiring an explicit ".domain.tld" pattern. This is
planned backwards compatibility: eventually, all Postfix features are
expected to require explicit ".domain.tld" style patterns when you
really want to match subdomains.
Set the parent_domain_matches_subdomains parameter, and don't
include relay_domains there.
I expect that "parent_domain_matches_subdomains = smtpd_access_maps"
would be practical for many sites.
Wietse
