On Thu, Nov 09, 2023 at 03:27:22PM -0500, Shaun Erickson via Postfix-users
wrote:
> mailserver.fd.com:
> Accepts all mail from our servers (including itself). If the mail is
> destined for fd.com, it is – with the exception of ab...@fd.com,
> postmas...@fd.com, and r...@fd.com – sent straight to /dev/null.
Use discard(8) after redirecting exceptions via virtual(5) aliases.
> Anything for ab...@fd.com, postmas...@fd.com, and r...@fd.com are
> seemingly delivered locally on mailserver.fd.com. However, abuse and
> postmaster are aliased to root, and root is aliased to my real-world
> corporate email address.
Just virtual(5) alias these.
> Anything not destined for fd.com, including email destined for my
> corporate address, is sent upstream to a real, legitimate, internal
> mail relay: mailserver.company.com.
client-access.cidr:
# Accept mail from all client IPs, use more specific CIDR blocks
# if possible.
::/0 permit
0.0.0.0/0 permit
main.cf:
# Upstream smarthost for deliverable mail.
#
relayhost = [mailserver.acme.example]
# No local(8) delivery
#
alias_database =
alias_maps =
mydestination =
local_recipient_maps =
local_transport = error:5.1.2 Mailbox unavailable
# Explicit internal domains.
#
relay_domains = fake.example, acme.example
# Clients allowed to reach external domains.
#
smtpd_relay_restrictions = check_client_access
# Inline CIDR syntax requires Postfix 3.7 or later
#
# cidr:{
# { ::/0 permit },
# { 0.0.0.0/0 permit }
# }
#
cidr:${config_directory}/client-access.cidr
# No recipient validation for either relay domain
#
relay_recipient_maps =
inline:{
{ @fake.example = wildcard },
{ @acme.example = wildcard }
}
# Discard unaliased recipients in fake domain.
#
transport_maps =
inline:{
{ fake.example = discard:silently }
}
# After aliasing the exceptions
#
virtual_alias_maps =
inline:{
{ root@fake.example = me@acme.example },
{ postmaster@fake.example = root@fake.example },
{ abuse@fake.example = root@fake.example }
}
--
Viktor.
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