summaryrefslogtreecommitdiffstats
path: root/proto/generic
blob: dc0ad417723583ecd0359b13415ab190376890d5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
#++
# NAME
#	generic 5
# SUMMARY
#	Postfix generic table format
# SYNOPSIS
#	\fBpostmap /etc/postfix/generic\fR
#
#	\fBpostmap -q "\fIstring\fB" /etc/postfix/generic\fR
#
#	\fBpostmap -q - /etc/postfix/generic <\fIinputfile\fR
# DESCRIPTION
#	The optional \fBgeneric\fR(5) table specifies an address
#	mapping that applies when mail is delivered. This is the
#	opposite of \fBcanonical\fR(5) mapping, which applies when
#	mail is received.
#
#	Typically, one would use the \fBgeneric\fR(5) table on a
#	system that does not have a valid Internet domain name and
#	that uses something like \fIlocaldomain.local\fR instead.
#	The \fBgeneric\fR(5) table is then used by the \fBsmtp\fR(8)
#	client to transform local mail addresses into valid Internet
#	mail addresses when mail has to be sent across the Internet.
#	See the EXAMPLE section at the end of this document.
#
#	The \fBgeneric\fR(5) mapping affects both message header
#	addresses (i.e. addresses that appear inside messages) and
#	message envelope addresses (for example, the addresses that
#	are used in SMTP protocol commands).
#
#	Normally, the \fBgeneric\fR(5) table is specified as a
#	text file that serves as input to the \fBpostmap\fR(1)
#	command.  The result, an indexed file in \fBdbm\fR or
#	\fBdb\fR format, is used for fast searching by the mail
#	system. Execute the command "\fBpostmap /etc/postfix/generic\fR"
#	to rebuild an indexed file after changing the corresponding
#	text file.
#
#	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 regular-expression
#	map where patterns are given as regular expressions, or lookups
#	can be directed to a TCP-based server. In those cases, the lookups
#	are done in a slightly different way as described below under
#	"REGULAR EXPRESSION TABLES" or "TCP-BASED TABLES".
# CASE FOLDING
# .ad
# .fi
#	The search string is folded to lowercase before database
#	lookup. As of Postfix 2.3, the search string is not case
#	folded with database types such as regexp: or pcre: whose
#	lookup fields can match both upper and lower case.
# TABLE FORMAT
# .ad
# .fi
#	The input format for the \fBpostmap\fR(1) command is as follows:
# .IP "\fIpattern result\fR"
#	When \fIpattern\fR matches a mail address, replace it by the
#	corresponding \fIresult\fR.
# .IP "blank lines and comments"
#	Empty lines and whitespace-only lines are ignored, as
#	are lines whose first non-whitespace character is a `#'.
# .IP "multi-line text"
#	A logical line starts with non-whitespace text. A line that
#	starts with whitespace continues a logical line.
# TABLE SEARCH ORDER
# .ad
# .fi
#	With lookups from indexed files such as DB or DBM, or from networked
#	tables such as NIS, LDAP or SQL, each \fIuser\fR@\fIdomain\fR
#	query produces a sequence of query patterns as described below.
#
#	Each query pattern is sent to each specified lookup table
#	before trying the next query pattern, until a match is
#	found.
# .IP "\fIuser\fR@\fIdomain address\fR"
#	Replace \fIuser\fR@\fIdomain\fR by \fIaddress\fR. This form
#	has the highest precedence.
# .IP "\fIuser address\fR"
#	Replace \fIuser\fR@\fIsite\fR by \fIaddress\fR when \fIsite\fR is
#	equal to $\fBmyorigin\fR, when \fIsite\fR is listed in
#	$\fBmydestination\fR, or when it is listed in $\fBinet_interfaces\fR
#	or $\fBproxy_interfaces\fR.
# .IP "@\fIdomain address\fR"
#	Replace other addresses in \fIdomain\fR by \fIaddress\fR.
#	This form has the lowest precedence.
# RESULT ADDRESS REWRITING
# .ad
# .fi
#	The lookup result is subject to address rewriting:
# .IP \(bu
#	When the result has the form @\fIotherdomain\fR, the
#	result becomes the same \fIuser\fR in \fIotherdomain\fR.
# .IP \(bu
#	When "\fBappend_at_myorigin=yes\fR", append "\fB@$myorigin\fR"
#	to addresses without "@domain".
# .IP \(bu
#	When "\fBappend_dot_mydomain=yes\fR", append
#	"\fB.$mydomain\fR" to addresses without ".domain".
# ADDRESS EXTENSION
# .fi
# .ad
#	When a mail address localpart contains the optional recipient delimiter
#	(e.g., \fIuser+foo\fR@\fIdomain\fR), the lookup order becomes:
#	\fIuser+foo\fR@\fIdomain\fR, \fIuser\fR@\fIdomain\fR, \fIuser+foo\fR,
#	\fIuser\fR, and @\fIdomain\fR.
#
#	The \fBpropagate_unmatched_extensions\fR parameter controls whether
#	an unmatched address extension (\fI+foo\fR) is propagated to the 
#	result of table lookup.
# REGULAR EXPRESSION TABLES
# .ad
# .fi
#	This section describes how the table lookups change when the table
#	is given in the form of regular expressions. For a description of
#	regular expression lookup table syntax, see \fBregexp_table\fR(5)
#	or \fBpcre_table\fR(5).
#
#	Each pattern is a regular expression that is applied to the entire
#	address being looked up. Thus, \fIuser@domain\fR mail addresses are not
#	broken up into their \fIuser\fR and \fI@domain\fR constituent parts,
#	nor is \fIuser+foo\fR broken up into \fIuser\fR and \fIfoo\fR.
#
#	Patterns are applied in the order as specified in the table, until a
#	pattern is found that matches the search string.
#
#	Results are the same as with indexed file lookups, with
#	the additional feature that parenthesized substrings from the
#	pattern can be interpolated as \fB$1\fR, \fB$2\fR and so on.
# TCP-BASED TABLES
# .ad
# .fi
#	This section describes how the table lookups change when lookups
#	are directed to a TCP-based server. For a description of the TCP
#	client/server lookup protocol, see \fBtcp_table\fR(5).
#	This feature is available in Postfix 2.5 and later.
#	
#	Each lookup operation uses the entire address once.  Thus,
#	\fIuser@domain\fR mail addresses are not broken up into their
#	\fIuser\fR and \fI@domain\fR constituent parts, nor is
#	\fIuser+foo\fR broken up into \fIuser\fR and \fIfoo\fR.
#
#	Results are the same as with indexed file lookups.
# EXAMPLE
# .ad
# .fi
#	The following shows a generic mapping with an indexed file.
#	When mail is sent to a remote host via SMTP, this replaces
#	\fIhis@localdomain.local\fR by his ISP mail address, replaces
#	\fIher@localdomain.local\fR by her ISP mail address, and
#	replaces other local addresses by his ISP account, with
#	an address extension of \fI+local\fR (this example assumes
#	that the ISP supports "+" style address extensions).
#
# .na
# .nf
#	/etc/postfix/main.cf:
#	    smtp_generic_maps = hash:/etc/postfix/generic
#
#	/etc/postfix/generic:
#	    his@localdomain.local   hisaccount@hisisp.example
#	    her@localdomain.local   heraccount@herisp.example
#	    @localdomain.local      hisaccount+local@hisisp.example
#
# .ad
# .fi
#	Execute the command "\fBpostmap /etc/postfix/generic\fR"
#	whenever the table is changed.  Instead of \fBhash\fR, some
#	systems use \fBdbm\fR database files. To find out what
#	tables your system supports use the command "\fBpostconf
#	-m\fR".
# BUGS
#	The table format does not understand quoting conventions.
# CONFIGURATION PARAMETERS
# .ad
# .fi
#	The following \fBmain.cf\fR parameters are especially relevant.  
#	The text below provides only a parameter summary. See
#	\fBpostconf\fR(5) for more details including examples.
# .IP "\fBsmtp_generic_maps (empty)\fR"
#	Optional lookup tables that perform address rewriting in the
#	Postfix SMTP client, typically to transform a locally valid address into
#	a globally valid address when sending mail across the Internet.
# .IP "\fBpropagate_unmatched_extensions (canonical, virtual)\fR"
#	What address lookup tables copy an address extension from the lookup
#	key to the lookup result.
# .PP
#	Other parameters of interest:
# .IP "\fBinet_interfaces (all)\fR"
#	The local network interface addresses that this mail system
#	receives mail on.
# .IP "\fBproxy_interfaces (empty)\fR"
#	The remote network interface addresses that this mail system receives mail
#	on by way of a proxy or network address translation unit.
# .IP "\fBmydestination ($myhostname, localhost.$mydomain, localhost)\fR"
#	The list of domains that are delivered via the $local_transport
#	mail delivery transport.
# .IP "\fBmyorigin ($myhostname)\fR"
#	The domain name that locally-posted mail appears to come
#	from, and that locally posted mail is delivered to.
# .IP "\fBowner_request_special (yes)\fR"
#	Enable special treatment for owner-\fIlistname\fR entries in the
#	\fBaliases\fR(5) file, and don't split owner-\fIlistname\fR and
#	\fIlistname\fR-request address localparts when the recipient_delimiter
#	is set to "-".
# SEE ALSO
#	postmap(1), Postfix lookup table manager
#	postconf(5), configuration parameters
#	smtp(8), Postfix SMTP client
# README FILES
# .ad
# .fi
#	Use "\fBpostconf readme_directory\fR" or
#	"\fBpostconf html_directory\fR" to locate this information.
# .na
# .nf
#	ADDRESS_REWRITING_README, address rewriting guide
#	DATABASE_README, Postfix lookup table overview
#	STANDARD_CONFIGURATION_README, configuration examples
# LICENSE
# .ad
# .fi
#	The Secure Mailer license must be distributed with this software.
# HISTORY
#	A genericstable feature appears in the Sendmail MTA.
#
#	This feature is available in Postfix 2.2 and later.
# AUTHOR(S)
#	Wietse Venema
#	IBM T.J. Watson Research
#	P.O. Box 704
#	Yorktown Heights, NY 10598, USA
#
#	Wietse Venema
#	Google, Inc.
#	111 8th Avenue
#	New York, NY 10011, USA
#--