Index: app/models/mail_handler.rb
===================================================================
--- app/models/mail_handler.rb	(revision 6095)
+++ app/models/mail_handler.rb	(working copy)
@@ -65,6 +65,14 @@
         if @user
           logger.info "MailHandler: [#{@user.login}] account created" if logger && logger.info
           Mailer.deliver_account_information(@user, @user.password)
+          if !@@handler_options[:unknown_user_group].nil?
+            # Fetch specified group.
+            @group = Group.find_by_name(@@handler_options[:unknown_user_group])
+            if !@group.nil?
+              # Attach the group to user.
+              @group.users << @user
+            end
+          end
         else
           logger.error "MailHandler: could not create account for [#{sender_email}]" if logger && logger.error
           return false
Index: app/models/group.rb
===================================================================
--- app/models/group.rb	(revision 6095)
+++ app/models/group.rb	(working copy)
@@ -24,6 +24,11 @@
   validates_presence_of :lastname
   validates_uniqueness_of :lastname, :case_sensitive => false
   validates_length_of :lastname, :maximum => 30
+
+  # Fetch group name.
+  def self.find_by_name(lastname)
+    find(:first, :conditions => ["LOWER(lastname) = ?", lastname.to_s.downcase])
+  end
     
   def to_s
     lastname.to_s
Index: extra/mail_handler/rdm-mailhandler.rb
===================================================================
--- extra/mail_handler/rdm-mailhandler.rb	(revision 6095)
+++ extra/mail_handler/rdm-mailhandler.rb	(working copy)
@@ -20,6 +20,7 @@
 #                                  ignore: email is ignored (default)
 #                                  accept: accept as anonymous user
 #                                  create: create a user account
+#       --unknown-user-group=....  name of new user primary group
 #       --no-permission-check      disable permission checking when receiving
 #                                  the email
 #   -h, --help                     show this help
@@ -72,7 +73,7 @@
 class RedmineMailHandler
   VERSION = '0.1'
   
-  attr_accessor :verbose, :issue_attributes, :allow_override, :unknown_user, :no_permission_check, :url, :key
+  attr_accessor :verbose, :issue_attributes, :allow_override, :unknown_user, :unknown_user_group, :no_permission_check, :url, :key
 
   def initialize
     self.issue_attributes = {}
@@ -90,6 +91,7 @@
       [ '--priority',             GetoptLong::REQUIRED_ARGUMENT],
       [ '--allow-override', '-o', GetoptLong::REQUIRED_ARGUMENT],
       [ '--unknown-user',         GetoptLong::REQUIRED_ARGUMENT],
+      [ '--unknown-user-group',   GetoptLong::REQUIRED_ARGUMENT],
       [ '--no-permission-check',  GetoptLong::NO_ARGUMENT]
     )
 
@@ -111,6 +113,8 @@
         self.allow_override = arg.dup
       when '--unknown-user'
         self.unknown_user = arg.dup
+      when '--unknown-user-group'
+        self.unknown_user_group = arg.dup
       when '--no-permission-check'
         self.no_permission_check = '1'
       end
@@ -127,6 +131,7 @@
     data = { 'key' => key, 'email' => email, 
                            'allow_override' => allow_override,
                            'unknown_user' => unknown_user,
+                           'unknown_user_group' => unknown_user_group,
                            'no_permission_check' => no_permission_check}
     issue_attributes.each { |attr, value| data["issue[#{attr}]"] = value }