Postfix for MongoDB is a fork of the famous Postfix SMTP daemon. It allows to store virtual email addresses in a MongoDB database.

So the difference between the official and this version is that the MongoDB dict lookup driver has been included. As long the C Driver of MongoDB (libmongoc) is not yet realized as official packages for main-stream Linux and BSD distributions, this dictionnary driver can not be included in the official version of Postfix daemon.

This is the first version, with very basic functions, so please consider it as alpha version and only be used by advanced and experienced users of Postfix with C programming knowledges.

In future, it would be good that this driver would be included in the official postfix release.

The postfix version used here is 2.9.4.

If you need additional extra-features, please contact me at contact@ferraro.net.

Example of a /etc/postfix/mmongodb-aliases.cf file:

#
# MongoDB Postfix Alias File
# (C) Stephan Ferraro <stephan@ferraro.net>, Ferraro Ltd.
#

# Hostname
host = 127.0.0.1

# Port
port = 27017

# Use authentification to log into mongodb
mongo_auth = 1
mongo_user = root
mongo_password = root

# The database name on the servers.
dbname = test


# Search query by key and return value
# Example:
# collection = address
# key = email
# value = newEmail
#
# This means in MongoDB JavaScript search query:
# use address;
# var response = db.address.find({email: full_email_address}); 
# console.log(response.newEmail);
#
# It would then return the property newEmail of the found object returned by MongoDB find() command.   
# The value with the full_email_address is filled up by Postfix.
collection = address
key = email
value = newEmail

The file can then be included so in the main.cf file:

virtual_mailbox_maps = mongodb:/etc/postfix/mongodb-aliases.cf

• find and return string value of the found object
• supports Plus Addressing formats, e.g. address+test@domain.tld
• reconnect to MongoDB server if it was gone or restarted

1. Download libmongoc version v0.7 at https://github.com/mongodb/mongo-c-driver/zipball/v0.7, compile it and then run make install to install it at /usr/local/lib

2. Install Ubuntu Linux Server 12.10 (maybe it works too on other Linux distributions, but I have not tested it)

3. Compile this postfix source code, on Ubuntu Linux you need to run:

    make tidy
    make makefiles CCARGS="-DUSE_TLS"
    make SYSLIBS="-L/usr/lib/x86_64-linux-gnu -lssl -lcrypto -lpcre -ldb -lnsl -lresolv -L/usr/local/lib -lmongoc"
    make install
   

4. Start MongoDB server

5. Configure Postfix configuration files, specially add in main.cf the entry "virtual_mailbox_maps = mongodb:/etc/postfix/mongodb-aliases.cf" and add the file /etc/postfix/mongodb-aliases.cf

6. Start Postfix server and check log file at /var/log/mail.log for debugging purposes

Simply try if it works by executing the following postfix command:

   # postmap -q 'address@domain.tld' mongodb:/etc/postfix/mongodb-aliases.cf 
   address@domain.tld
   # postmap -q 'address+test@domain.tld' mongodb:/etc/postfix/mongodb-aliases.cf 
   address@domain.tld

If nothing appears, then postmap command should return with an exit code of 1. You can check it with the echo command:

  # echo $?
  1

If you need new features, please contact me at contact@ferraro.net. Any project work need to be paid. Additionally any work on it it will be included for everyone in this GitHub repository as its an open source project.