Postfix Overview - Introduction - SCN Research

ACCESS(5)
ACCESS(5)
Page 1 of 3
NAME
access - format of Postfix access table
SYNOPSIS
postmap
/etc/postfix/access
DESCRIPTION
The optional access table directs the Postfix SMTP server
to selectively reject or accept mail from or to specific
hosts, domains, networks, host addresses or mail
addresses.
Normally, the access table is specified as a text file
that serves as input to the postmap(1) command. The
result, an indexed file in dbm or db format, is used for
fast searching by the mail system. Execute the command
postmap /etc/postfix/access in order to rebuild the
indexed file after changing the access table.
When the table is provided via other means such as NIS,
LDAP or SQL, the same lookups are done as for ordinary
indexed files.
Alternatively, the table can be provided as a regularexpression
map where patterns are given as regular expressions.
In that case, the lookups are done in a slightly
different way as described below.
TABLE
FORMAT
The format of the access table is as follows:
blanks and comments
Blank lines are ignored, as are lines beginning
with `#'.
leading whitespace
Lines that begin with whitespace continue the previous
line.
pattern action
When pattern matches a mail address, domain or host
address, perform the corresponding action.
PATTERNS
With lookups from indexed files such as DB or DBM, or from
networked tables such as NIS, LDAP or SQL, patterns are
tried in the order as listed below:
user@domain
Matches the specified mail address.
domain.name
Matches the domain.name itself and any subdomain
thereof, either in hostnames or in mail addresses.
Top-level domains will never be matched.
user@ Matches all mail addresses with the specified user
part.
net.work.addr.ess
http://www.porcupine.org/postfix-mirror/access.5.html
6/26/01