TRIVIAL-REWRITE(8) TRIVIAL-REWRITE(8)
NAME
trivial-rewrite - Postfix address rewriting and resolving
daemon
SYNOPSIS
trivial-rewrite [generic Postfix daemon options]
DESCRIPTION
The trivial-rewrite daemon processes two types of client
service requests:
rewrite
Rewrite an address to standard form. The trivial-
rewrite daemon by default appends local domain
information to unqualified addresses, swaps bang
paths to domain form, and strips source routing
information. This process is under control of sev-
eral configuration parameters (see below).
resolve
Resolve an address to a (transport, nexthop, recip-
ient) triple. The meaning of the results is as fol-
lows:
transport
The delivery agent to use. This is the first
field of an entry in the master.cf file.
nexthop
The host to send to. For local delivery this
is an empty string.
recipient
The envelope recipient address that is
passed on to nexthop.
The trivial-rewrite daemon by default only distin-
guishes between local and non-local mail. For finer
control over mail routing, use the optional trans-
port(5) lookup table.
This program expects to be run from the master(8) process
manager.
STANDARDS
None. The command does not interact with the outside
world.
SECURITY
The trivial-rewrite daemon is not security sensitive. By
default, this daemon does not talk to remote or local
users. It can run at a fixed low privilege in a chrooted
environment.
DIAGNOSTICS
Problems and transactions are logged to syslogd(8).
BUGS
CONFIGURATION PARAMETERS
The following main.cf parameters are especially relevant
to this program. See the Postfix main.cf file for syntax
details and for default values. Use the postfix reload
command after a configuration change.
Miscellaneous
inet_interfaces
The network interfaces that this mail system
receives mail on. This information is used to
determine if user@[net.work.addr.ess] is local or
remote.
mydestination
List of domains that this machine considers local.
myorigin
The domain that locally-posted mail appears to come
from.
resolve_unquoted_address
When resolving an address, do not quote the address
localpart as per RFC 822, so that additional @, %
or ! characters remain visible. This is techni-
cally incorrect, but allows us to stop relay
attacks when forwarding mail to a Sendmail primary
MX host.
Rewriting
allow_percent_hack
Rewrite user%domain to user@domain.
append_at_myorigin
Rewrite user to user@$myorigin.
append_dot_mydomain
Rewrite user@host to user@host.$mydomain.
swap_bangpath
Rewrite site!user to user@site.
Routing
local_transport
Where to deliver mail for destinations that match
$mydestination or $inet_interfaces. The default
transport is local.
Syntax is transport:nexthop; see transport(5) for
details. The :nexthop part is optional.
default_transport
Where to deliver non-local mail when no information
is explicitly given in the transport(5) table. The
default transport is smtp.
Syntax is transport:nexthop; see transport(5) for
details. The :nexthop part is optional.
parent_domain_matches_subdomains
List of Postfix features that use domain.tld pat-
terns to match sub.domain.tld (as opposed to
requiring .domain.tld patterns).
relayhost
The default host to send non-local mail to when no
entry is matched in the transport(5) table.
When no relayhost is specified, mail is routed
directly to the destination's mail exchanger.
transport_maps
List of tables with domain to (transport, nexthop)
mappings.
SEE ALSO
master(8) process manager
syslogd(8) system logging
transport(5) transport table format
LICENSE
The Secure Mailer license must be distributed with this
software.
AUTHOR(S)
Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
TRIVIAL-REWRITE(8)