From 95f5f6d1c3aec1cb62525f5162e71a4157aca717 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 13 Apr 2024 10:42:27 +0200 Subject: Merging upstream version 3.9.0. Signed-off-by: Daniel Baumann --- html/MONGODB_README.html | 263 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 263 insertions(+) create mode 100644 html/MONGODB_README.html (limited to 'html/MONGODB_README.html') diff --git a/html/MONGODB_README.html b/html/MONGODB_README.html new file mode 100644 index 0000000..a05d1f5 --- /dev/null +++ b/html/MONGODB_README.html @@ -0,0 +1,263 @@ + + + +Postfix MongoDB Howto + + + +

Postfix MongoDB Howto

+
+ +

MongoDB Support in Postfix

+ +

Postfix can use MongoDB as a source for any of its lookups: +aliases(5), virtual(5), canonical(5), etc. This allows you to keep +information for your mail service in a replicated noSQL database +with fine-grained access controls. By not storing it locally on the +mail server, the administrators can maintain it from anywhere, and +the users can control whatever bits of it you think appropriate. +You can have multiple mail servers using the same information, +without the hassle and delay of having to copy it to each.

+ +

Topics covered in this document:

+ + + +

Building Postfix with MongoDB support

+ +

These instructions assume that you build Postfix from source +code as described in the INSTALL document. Some modification may +be required if you build Postfix from a vendor-specific source +package.

+ +

The Postfix MongoDB client requires the mongo-c-driver +library. This can be built from source code from the +mongod-c project, or this can be installed as a binary package +from your OS distribution, typically named mongo-c-driver, +mongo-c-driver-devel or libmongoc-dev. +Installing the mongo-c-driver library may also install libbson +as a dependency.

+ +

To build Postfix with mongodb map support, add to the CCARGS +environment variable the options -DHAS_MONGODB and -I for the +directory containing the mongodb headers, and specify the AUXLIBS_MONGODB +with the libmongoc and libbson libraries, for example:

+ +
+
+% make tidy
+% make -f Makefile.init makefiles \
+    CCARGS="$CCARGS -DHAS_MONGODB -I/usr/include/libmongoc-1.0 \
+    -I/usr/include/libbson-1.0" \
+    AUXLIBS_MONGODB="-lmongoc-1.0 -lbson-1.0"
+
+
+ +

The 'make tidy' command is needed only if you have previously +built Postfix without MongoDB support.

+ +

If your MongoDB shared library is in a directory that the RUN-TIME +linker does not know about, add a "-Wl,-R,/path/to/directory" option +after "-lbson-1.0". Then, just run 'make'.

+ +

Configuring MongoDB lookups

+ +

In order to use MongoDB lookups, define a MongoDB source as a +table lookup in main.cf, for example:

+ +
+
+alias_maps = hash:/etc/aliases, proxy:mongodb:/etc/postfix/mongo-aliases.cf
+
+
+ +

The file /etc/postfix/mongo-aliases.cf can specify a number of +parameters. For a complete description, see the mongodb_table(5) +manual page.

+ +

Example: virtual(5) alias maps

+ +

Here's a basic example for using MongoDB to look up virtual(5) +aliases. Assume that in main.cf, you have:

+ +
+
+virtual_alias_maps = hash:/etc/postfix/virtual_aliases, 
+    proxy:mongodb:/etc/postfix/mongo-virtual-aliases.cf
+
+
+ +

and in mongodb:/etc/postfix/mongo-virtual-aliases.cf you have:

+ +
+
+uri = mongodb+srv://user_name:password@some_server
+dbname = mail
+collection = mailbox
+query_filter = {"$or": [{"username":"%s"}, {"alias.address": "%s"}], "active": 1}
+result_attribute = username
+
+
+ +

This example assumes mailbox names are stored in a MongoDB backend, +in a format like:

+ +
+
+{ "username": "user@example.com",
+  "alias": [
+    {"address": "admin@example.com"},
+    {"address": "abuse@example.com"}
+  ],
+  "active": 1
+}
+
+
+ +

Upon receiving mail for "admin@example.com" that isn't found in the +/etc/postfix/virtual_aliases database, Postfix will search the +MongoDB server/cluster listening at port 27017 on some_server. It +will connect using the provided credentials, and search for any +entries whose username is, or alias field has "admin@example.com". +It will return the username attribute of those found, and build a +list of their email addresses.

+ +

Notes:

+ + + +

Example: Mailing lists

+ +

When it comes to mailing lists, one way of implementing one would +be as below:

+ +
+
+{ "name": "dev@example.com", "active": 1, "address": 
+  [ "hamid@example.com", "wietse@example.com", "viktor@example.com" ] }
+
+
+ +

using the filter below, will result in a comma separated string +with all email addresses in this list.

+ +
+
+query_filter = {"name": "%s", "active": 1}
+result_attribute = address
+
+
+ +

Notes:

+ + + +

Example: advanced projections

+ +

This module also supports the use of more complex MongoDB +projections. There may be some use cases where operations such as +concatenation are necessary to be performed on the data retrieved +from the database. Although it is encouraged to keep the database +design simple enough so this is not necessary, postfix supports the +use of MongoDB projections to achieve the goal.

+ +

Consider the example below:

+ +
+
+{ "username": "user@example.com",
+  "local_part": "user",
+  "domain": "example.com",
+  "alias": [
+    {"address": "admin@example.com"},
+    {"address": "abuse@example.com"}
+  ],
+  "active": 1
+}
+
+
+ +

virtual_mailbox_maps can be created using below parameters in a +mongodb:/etc/postfix/mongo-virtual-mailboxes.cf file:

+ +
+
+uri = mongodb+srv://user_name:password@some_server
+dbname = mail
+collection = mailbox
+query_filter = {"$or": [{"username":"%s"}, {"alias.address": "%s"}], "active": 1}
+projection = { "mail_path": {"$concat": ["$domain", "/", "$local_part"]} }
+
+
+ +

This will return 'example.com/user' path built from the database fields.

+ +

A couple of considerations when using projections:

+ + + +

Feedback

+ +

If you have questions, send them to postfix-users@postfix.org. +Please include relevant information about your Postfix setup: +MongoDB-related output from postconf, which libraries you built +with, and such. If your question involves your database contents, +please include the applicable bits of some database entries.

+ +

Credits

+ + + + + + -- cgit v1.2.3