Setting OG Mailinglist up the hard way using MTA

The easier way to set up OG Mailinglist is to use MailGun.com services. For some people this doesn't cut it, so here is the hard way.

Exim4

This is pretty much a copy of the following file:
http://drupalcode.org/project/og_mailinglist.git/blob_plain/refs/heads/7...

Go to sites/all/modules/og_mailinglist/backends/exim_og_mailinglist directory.

1. Copy this entire folder to /etc/exim4/

   cp -r ../exim_og_mailinglist /etc/exim4/

2. Link or copy 950_exim4-config_drupal_og_mailinglist_router to /etc/exim4/conf.d/router/950_exim4-config_drupal_og_mailinglist_router

   ln -s \
   /etc/exim4/exim_og_mailinglist/950_exim4-config_drupal_og_mailinglist_router \
   /etc/exim4/conf.d/router/950_exim4-config_drupal_og_mailinglist_router

3. Link or copy 95_exim4-config_drupal_og_mailinglist_transport to /etc/exim4/conf.d/transport/95_exim4-config_drupal_og_mailinglist_transport

   ln -s \
   /etc/exim4/exim_og_mailinglist/95_exim4-config_drupal_og_mailinglist_transport \
   /etc/exim4/conf.d/transport/95_exim4-config_drupal_og_mailinglist_transport

4. Copy example.site_info.php to site_info.php

   cp /etc/exim4/exim_og_mailinglist/example.site_info.php \
   /etc/exim4/exim_og_mailinglist/site_info.php

5. Adjust settings in site_info.php file. Read on how to set up site_info.php file.

   nano /etc/exim4/exim_og_mailinglist/site_info.php

Run dpkg-reconfigure exim4-config on Debain/Ubuntu systems and ensure that the "Other destinations for which mail is accepted:" or "local domains" setting includes your site's domain name. Otherwise, Exim will simply reject emails directed to this domain.

Also allow exim4 to recieve mail from wilderness, set "IP-addresses to listen on for incoming SMTP connections" to be blank, otherwise only listed hosts can send you email.

6. Restart exim by running /etc/init.d/exim4 restart

   Note that on some operating systems like Debian, you need to run update-exim4.conf.template to actually update the configuration before restarting. See your installation's Exim documentation for specifics.

7. Test setup by sending email to a test group's email on your site, e.g. test-group@example.com

Debugging help for when things don't work:
SSH into your server, run "tail -f /var/log/exim/mainlog" to see that emails are actually reaching your server and that the og_mailinglist router/transports are being called. Also, it might help to look at the Drupal logs at admin/reports/dblog

Testing

To test this script you could invoke it from command line as follows (when inside the og_mailinglist directory; you also need to adjust domain to match your Drupal installation):
/etc/exim4/exim_og_mailinglist/og_mailinglist_debug.sh example.com < testing/applemail

Postfix

This is pretty much a copy of the following file:
http://drupalcode.org/project/og_mailinglist.git/blob_plain/refs/heads/7...

Set up scripts

• Enable postfix access to og_mailinglist_postfix_transport.php, copy entire sites/all/modules/og_mailinglist/backends/postfix_og_mailinglist folder to /etc/postfix/

  cp -r ../postfix_og_mailinglist /etc/postfix/

• Copy example.site_info.php to site_info.php and make it's
  contents match your installation. Read on how to set up site_info.php file.

  cp /etc/postfix/postfix_og_mailinglist/example.site_info.php \
  /etc/postfix/postfix_og_mailinglist/site_info.php

  Set up Postfix

  There are two ways to accomplish this. You could either use a pipe command (the easier way) or if you define your email addresses e.g using MySql database, you could use the transport map (the slightly harder way). You should not use both of these at once.

  Pipe command

  To set up an alias address in a virtual domain, using a pipe command, add it to your Postfix alias file /etc/aliases (as is often done for Mailman addresses):

  @example.com "| /etc/postfix/postfix_og_mailinglist/og_mailinglist_postfix_transport.php ${DOMAIN}"

  Or if you prefer not to use catchall address:

  test: "| /etc/postfix/postfix_og_mailinglist/og_mailinglist_postfix_transport.php ${DOMAIN}"

  When debbugging, you could temporarily use this one (writes mails and errors to /tmp):

  test: "| /etc/postfix/postfix_og_mailinglist/og_mailinglist_debug.sh ${DOMAIN}"

  Transport map

  Instead of using a simple Mailman type pipe to a command, it is also possible to define email addresses in the normal way, then use a special transport to handle delivery. You might want to do this if you define a good portion of your addresses via MySQL.

  • Add a line to your virtual map, it might thus look like this:

    test@example.com @groups.example.com

  • Add transport map, so Postfix knows how to deliver email (/etc/postfix/transport):

    test@groups.example.com og_mailinglist:

  • Add the transport command to /etc/postfix/master.cf to define the 'og_mailinglist' transport. If you use "direct_posting" method, set the user=mail:www-data or similar, so it has permissions necessary to read drupal files, especially sites/default/settings.php

    The command might look like this:

      flags=FR user=nobody directory=/etc/postfix/postfix_og_mailinglist \
        argv=og_mailinglist_postfix_transport.php ${domain}

    Complete entry example (directory does not seem to work in ubuntu):

    og_mailinglist  unix  - n n - - pipe -v
    flags=FR user=nobody  argv=/etc/postfix/postfix_og_mailinglist/og_mailinglist_postfix_transport.php ${domain}

    -v at end of first line gives you verbose output in the mail log

  Testing

  To test this script you could invoke it from command line as follows (when inside the og_mailinglist directory; you also need to adjust domain to match your Drupal installation):
  /etc/postfix/postfix_og_mailinglist/og_mailinglist_debug.sh example.com < testing/applemail