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Basic Postfix Configurations
Cristiano Otto Von Trompczynski
11.. LLooccaall ppaatthh iinnffoorrmmaattiioonn
QQuueeuuee ddiirreeccttoorryy
The "Queue directory" option specifies the location of the
Postfix queue. This is also the root directory of Postfix
daemons that run chrooted. See the files in examples/chroot-
setup/ for setting up Postfix chroot environments on different
UNIX systems. This option sets the "queue_directory" postfix
variable.
CCoommmmaanndd ddiirreeccttoorryy
The "Command directory" option specifies the location of all
postXXX commands. The default value is taken from the "Program
directory" option in Miscellaneous. This option sets the
"command_directory" postfix variable.
DDaaeemmoonn ddiirreeccttoorryy
The "Daemon directory" option specifies the location of all
Postfix daemon programs (i.e. programs listed in the master.cf
file). The default value is taken from the "Program directory"
option in Miscellaneous. This directory must be owned by root.
This option sets the "daemon_directory" postfix variable.
22.. QQuueeuuee aanndd pprroocceessss oowwnneerrsshhiipp
MMaaiill oowwnneerr
The "Mail owner" option specifies the owner of the Postfix queue
and of most "Postfix daemon processes". Specify the name of a
user account THAT DOES NOT SHARE A GROUP WITH OTHER ACCOUNTS AND
THAT OWNS NO OTHER FILES OR PROCESSES ON THE SYSTEM. In
particular, don't specify nobody or daemon. PLEASE USE A
DEDICATED USER. This option sets the "mail_owner" postfix
variable.
DDeeffaauulltt pprriivviilleeggeess
The "Default privileges" option specifies the default rights
used by the local delivery agent for delivery to external file
or command. These rights are used in the absence of a recipient
user context. DO NOT SPECIFY A PRIVILEGED USER OR THE POSTFIX
OWNER. This option sets the "default_privs" postfix variable.
33.. IInntteerrnneett hhoosstt aanndd ddoommaaiinn nnaammeess
HHoossttnnaammee
The "Hostname" option specifies the "internet hostname" of this
mail system. The default is to use the fully-qualified domain
name from gethostname(). The "Hostname" option is used as a
default value for many other configuration parameters. This
option sets the "myhostname" postfix variable.
DDoommaaiinn
The "Domain" option specifies the local internet domain name.
The default is to use the contents of "Hostname" minus the first
component. The "Domain" option is used as a default value for
many other configuration parameters. This option sets the
"mydomain" postfix variable.
44.. SSeennddiinngg mmaaiill
OOrriiggiinn
The "Origin" option specifies the domain that locally-posted
mail appears to come from. The default is to append "hostname",
which is fine for small sites. If you run a domain with
multiple machines, you should (1) change this to "domain" and
(2) set up a domain-wide alias database that aliases each user
to user@that.users.mailhost. This option sets the "myorigin"
postfix variable.
55.. RReecceeiivviinngg mmaaiill
NNeettwwoorrkk iinntteerrffaaccee
The "Network interfaces" option specifies the network interface
addresses that this mail system receives mail on. By default,
the software claims _a_l_l active interfaces on the machine. The
parameter also controls delivery of mail to user@[ip.address].
This option sets the "inet_interfaces" postfix variable.
DDeessttiinnaattiioonn
The "Destination" option specifies the list of domains that this
machine considers itself the final destination for. That does
not include domains that are hosted on this machine. Those
domains are specified elsewhere (see sample-virtual.cf, and
sample-transport.cf).
The default is "myhostname + localhost.$mydomain". On a mail
domain gateway, you should also include "$mydomain". Do not
specify the names of domains that this machine is backup
MX host for. Specify those names via the "Relay domains"
option in
The local machine is always the final destination for mail
addressed to user@[the.net.work.address] of an interface that
the mail system receives mail on (see the Inet interfaces help).
Specify a list of host or domain names, /file/name or type:table
patterns, separated by commas and/or whitespace. A /file/name
pattern is replaced by its contents; a type:table is matched
when a name matches a lookup key. This option sets the
"inet_interfaces" postfix variable.
DO NOT LIST VIRTUAL DOMAINS HERE. LIST THEM IN THE
TABLE->VIRTUAL ITEM INSTEAD. BE SURE TO READ THE ENTIRE VIRTUAL
MANUAL PAGE.
66.. RReejjeeccttiinngg uunnkknnoowwnn llooccaall uusseerrss
LLooccaall rreecciippiieenntt mmaappss
The "Local recipient maps" option specifies optional lookup
tables with all users that are local with respect to
"$mydestination" and "$inet_interfaces". If this parameter is
defined, then the SMTP server will reject mail for unknown local
users.
The "Local recipient maps" option accepts tables with bare
usernames such as unix:passwd.byname and alias maps.
Beware: if the Postfix SMTP server runs chrooted, you may have
to copy the passwd database into the jail. This is system
dependent.
This option sets the "local_recipient_maps" postfix variable.
FOR THIS TO WORK, DO NOT SPECIFY VIRTUAL DOMAINS IN
MYDESTINATION. MYDESTINATION MUST LIST NON-VIRTUAL DOMAINS
ONLY.
77.. DDeebbuuggggiinngg ccoonnttrrooll
DDeebbuugg ppeeeerr lleevveell
The "Debug peer level" option specifies the increment in verbose
logging level when an SMTP client or server host name or address
matches a pattern in the "Debug peer list" option. This option
sets the "debug_peer_level" postfix variable.
DDeebbuugg ppeeeerr lliisstt
The "Debug peer list" option specifies an optional list of
domain or network patterns, /file/name patterns or type:name
tables. When an SMTP client or server host name or address
matches a pattern, increase the verbose logging level by the
amount specified in the "Debug peer level" option. This option
sets the "debug_peer_list" postfix variable.
DDeebbuuggggeerr ccoommmmaanndd
The "Debugger command" option specifies the external command
that is executed when a Postfix daemon program is run with the
-D option.
Use "command .. & sleep 5" so that the debugger can attach
before the process marches on. If you use an X-based debugger,
be sure to set up your XAUTHORITY environment variable before
starting Postfix. This option sets the "debugger_command"
postfix variable.
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