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authorGuilhem Moulin <guilhem@fripost.org>2014-07-10 00:53:15 +0200
committerGuilhem Moulin <guilhem@fripost.org>2015-06-07 02:52:54 +0200
commitee046343f3bbb43dc48a8ad72b5cb16dc0a24ee6 (patch)
treee7f561209204ff5cafc50b22016ab3518c30a6ee /roles/MX/templates/etc/postfix/virtual
parentceed530fc7e867911eee84a3da06c872bb4611ab (diff)
Explain why we use static transport maps and custom subdomains.
Diffstat (limited to 'roles/MX/templates/etc/postfix/virtual')
-rw-r--r--roles/MX/templates/etc/postfix/virtual/transport.j216
1 files changed, 16 insertions, 0 deletions
diff --git a/roles/MX/templates/etc/postfix/virtual/transport.j2 b/roles/MX/templates/etc/postfix/virtual/transport.j2
index 9eac2be..57a0349 100644
--- a/roles/MX/templates/etc/postfix/virtual/transport.j2
+++ b/roles/MX/templates/etc/postfix/virtual/transport.j2
@@ -1,3 +1,19 @@
+# Each valid address user@example.org is aliased (on the MX) into some
+# example.org/user@xxx.fripost.org, and non-defaults next-hop:port are
+# chosen here in that table, depending on 'xxx'. The reason for such
+# indirection is that there is only one qmgr(8) daemon, which delegate
+# the routing strategy to the trivial-rewrite(8), which in turns queries
+# transport_maps. Hence high latency maps such as LDAP or SQL would
+# congestion the queue manager. On the other hand, virtual aliasing is
+# performed by cleanup(8), multiples instances of which can run in
+# parallel. See http://www.postfix.org/ADDRESS_REWRITING_README.html .
+#
+# /!\ WARNING: xxx.fripost.org should NOT be in the list of valid
+# domains ($virtual_alias_domains)! Otherwise at the next iteration of
+# the alias resolution loop the domain will be validated but not the
+# address, and the MTA will reply with "Recipient address rejected: User
+# unknown in virtual alias table".
+
reserved.fripost.org reserved-alias:
{% if 'LDA' in group_names %}