Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 117 insertions, 0 deletions

diff --git a/README_FILES/LOCAL_RECIPIENT_README b/README_FILES/LOCAL_RECIPIENT_README
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+RReejjeeccttiinngg UUnnkknnoowwnn LLooccaall RReecciippiieennttss wwiitthh PPoossttffiixx
+
+-------------------------------------------------------------------------------
+
+IInnttrroodduuccttiioonn
+
+As of Postfix version 2.0, the Postfix SMTP server rejects mail for unknown
+recipients in local domains (domains that match $mydestination or the IP
+addresses in $inet_interfaces or $proxy_interfaces) with "User unknown in local
+recipient table". This feature was optional with earlier Postfix versions.
+
+The good news is that this keeps undeliverable mail out of your queue, so that
+your mail queue is not clogged up with undeliverable MAILER-DAEMON messages.
+
+The bad news is that it may cause mail to be rejected when you upgrade from a
+Postfix system that was not configured to reject mail for unknown local
+recipients.
+
+This document describes what steps are needed in order to reject unknown local
+recipients correctly.
+
+  * Configuring local_recipient_maps in main.cf
+  * When you need to change the local_recipient_maps setting in main.cf
+  * Local recipient table format
+
+CCoonnffiigguurriinngg llooccaall__rreecciippiieenntt__mmaappss iinn mmaaiinn..ccff
+
+The local_recipient_maps parameter specifies lookup tables with all names or
+addresses of local recipients. A recipient address is local when its domain
+matches $mydestination, $inet_interfaces or $proxy_interfaces. If a local
+username or address is not listed in $local_recipient_maps, then the Postfix
+SMTP server will reject the address with "User unknown in local recipient
+table".
+
+The default setting, shown below, assumes that you use the default Postfix
+local(8) delivery agent for local delivery, where recipients are either UNIX
+accounts or local aliases:
+
+    /etc/postfix/main.cf:
+        local_recipient_maps = proxy:unix:passwd.byname $alias_maps
+
+To turn off unknown local recipient rejects by the SMTP server, specify:
+
+    /etc/postfix/main.cf:
+        local_recipient_maps =
+
+That is, an empty value. With this setting, the Postfix SMTP server will not
+reject mail with "User unknown in local recipient table". DDoonn''tt ddoo tthhiiss oonn
+ssyysstteemmss tthhaatt rreecceeiivvee mmaaiill ddiirreeccttllyy ffrroomm tthhee IInntteerrnneett.. WWiitthh ttooddaayy''ss wwoorrmmss aanndd
+vviirruusseess,, PPoossttffiixx wwiillll bbeeccoommee aa bbaacckkssccaatttteerr ssoouurrccee:: iitt aacccceeppttss mmaaiill ffoorr nnoonn--
+eexxiisstteenntt rreecciippiieennttss aanndd tthheenn ttrriieess ttoo rreettuurrnn tthhaatt mmaaiill aass ""uunnddeelliivveerraabbllee"" ttoo
+tthhee oofftteenn ffoorrggeedd sseennddeerr aaddddrreessss.
+
+WWhheenn yyoouu nneeeedd ttoo cchhaannggee tthhee llooccaall__rreecciippiieenntt__mmaappss sseettttiinngg iinn mmaaiinn..ccff
+
+  * Problem: you don't use the default Postfix local(8) delivery agent for
+    domains matching $mydestination, $inet_interfaces, or $proxy_interfaces.
+    For example, you redefined the "local_transport" setting in main.cf.
+
+    Solution: your local_recipient_maps setting needs to specify a database
+    that lists all the known user names or addresses for that delivery agent.
+    For example, if you deliver users in $mydestination etc. domains via the
+    virtual(8) delivery agent, specify:
+
+    /etc/postfix/main.cf
+        mydestination = $myhostname localhost.$mydomain localhost ...
+        local_transport = virtual
+        local_recipient_maps = $virtual_mailbox_maps
+
+    If you use a different delivery agent for $mydestination etc. domains, see
+    the section "Local recipient table format" below for a description of how
+    the table should be populated.
+
+  * Problem: you use the mailbox_transport or fallback_transport feature of the
+    Postfix local(8) delivery agent in order to deliver mail to non-UNIX
+    accounts.
+
+    Solution: you need to add the database that lists the non-UNIX users:
+
+    /etc/postfix/main.cf
+        local_recipient_maps = proxy:unix:passwd.byname, $alias_maps,
+            <the database with non-UNIX accounts>
+
+    See the section "Local recipient table format" below for a description of
+    how the table should be populated.
+
+  * Problem: you use the luser_relay feature of the Postfix local delivery
+    agent.
+
+    Solution: you must disable the local_recipient_maps feature completely, so
+    that Postfix accepts mail for all local addresses:
+
+    /etc/postfix/main.cf
+        local_recipient_maps =
+
+LLooccaall rreecciippiieenntt ttaabbllee ffoorrmmaatt
+
+If you use local files in postmap(1) format, then local_recipient_maps expects
+the following table format:
+
+  * In the left-hand side, specify a bare username, an "@domain.tld" wild-card,
+    or specify a complete "user@domain.tld" address.
+
+  * You have to specify something on the right-hand side of the table, but the
+    value is ignored by local_recipient_maps.
+
+If you use lookup tables based on NIS, LDAP, MYSQL, or PGSQL, then
+local_recipient_maps does the same queries as for local files in postmap(1)
+format, and expects the same results.
+
+With regular expression tables, Postfix only queries with the full recipient
+address, and not with the bare username or the "@domain.tld" wild-card.
+
+NOTE: a lookup table should always return a result when the address exists, and
+should always return "not found" when the address does not exist. In
+particular, a zero-length result does not count as a "not found" result.
+