###
6.2.3 Transport for Exim 3

Add this to the transports section of your Exim config file, i.e. somewhere between the first and second ``end'' line:

      mailman_transport:
        driver = pipe
        command = MAILMAN_WRAP \
                  '${if def:local_part_suffix \
                        {${sg{$local_part_suffix}{-(\\w+)(\\+.*)?}{\$1}}} \
                        {post}}' \
                  $local_part
        current_directory = MAILMAN_HOME
        home_directory = MAILMAN_HOME
        user = MAILMAN_USER
        group = MAILMAN_GROUP