diff --git a/app/controllers/invitations_controller.rb b/app/controllers/invitations_controller.rb
index d687f8e..378ba56 100644
--- a/app/controllers/invitations_controller.rb
+++ b/app/controllers/invitations_controller.rb
@@ -1,41 +1,42 @@
 class InvitationsController < ApplicationController
   before_action :fetch_invitation, only: [:accept]
 
   # POST /invitations
   def create
     invitation = Invitation.new(fetch_params)
     if invitation.save
+      invitation.notify_user
       flash[:success] = "User #{invitation.user.username} has been invited to the client"
     else
       flash[:alert] = 'Invitation not created'
     end
 
     redirect_to :back
   end
 
   # GET /invitations/:host_id/:verification_code
   def accept
     return redirect_to root_path unless @invitation
     host = @invitation.host
     if !@invitation.host.users.include? @invitation.user
       if @invitation.host.users << @invitation.user
         @invitation.destroy
       end
     else
       @invitation.destroy
     end
 
     redirect_to client_path(host.client)
   end
 
   private
 
   def fetch_params
     params.require(:invitation).permit(:user_id, :host_id)
   end
 
   def fetch_invitation
     @invitation = Invitation.find_by(host_id: params[:host_id],
                                    verification_code: params[:verification_code])
   end
 end
diff --git a/app/mailers/user_mailer.rb b/app/mailers/user_mailer.rb
index bd51c31..37575fe 100644
--- a/app/mailers/user_mailer.rb
+++ b/app/mailers/user_mailer.rb
@@ -1,24 +1,35 @@
 class UserMailer < ActionMailer::Base
   default from: Archiving.settings[:default_sender]
 
   # Notifies the host's owners that the host has been verified by an admin
   # and is now ready to be configured
   #
   # @param user_emails[Array] the owners' emails
   # @param host[String] the host's FQDN
   def notify_for_verification(user_emails, host)
     @host = host
     s = "[Archiving] Host #{host} verification"
     mail(to: user_emails, subject: s)
   end
 
+  # Notifies the user that another user has requested that he should be able to
+  # manage the given client's backups
+  #
+  # @param email[String] the user's email
+  # @param invitation[Invitation] the target host
+  def notify_for_invitation(email, invitation)
+    @invitation = invitation
+    subject = "[Archiving] Invitation to manage #{@invitation.host.name}'s backups"
+    mail(to: email, subject: subject)
+  end
+
   # Notifies admin about a new host that needs verification
   #
   # @param user[User] the user that created the host
   # @param host[String] the host's FQDN
   def notify_admin(user, host)
     @user = user
     @host = host
     mail(to: Archiving.settings[:admin_email], subject: 'New host pending verification')
   end
 end
diff --git a/app/models/invitation.rb b/app/models/invitation.rb
index 344cb78..f281f6b 100644
--- a/app/models/invitation.rb
+++ b/app/models/invitation.rb
@@ -1,17 +1,34 @@
 # `Invitation` describes the pending invitation of a user to join a host.
 class Invitation < ActiveRecord::Base
   belongs_to :user
   belongs_to :host
 
   validates :user, :host, :verification_code, presence: true
 
   before_validation :calculate_verification_code
 
+  # Sends an email to the user to inform that there is an invitation to
+  # handle the client's backups.
+  def notify_user
+    UserMailer.notify_for_invitation(user.email, self).deliver
+  end
+
+  # Fetches the parameters that can be passed to accept_invitation_url in
+  #  order to generate the correct url
+  #
+  # @return [Hash]
+  def accept_hash
+    {
+      host_id: host_id,
+      verification_code: verification_code
+    }
+  end
+
   private
 
   def calculate_verification_code
     self.verification_code = Digest::SHA256.hexdigest(
       [host.name, Time.now.to_s, Rails.application.secrets.salt].join
     )
   end
 end
diff --git a/app/views/user_mailer/notify_for_invitation.text.erb b/app/views/user_mailer/notify_for_invitation.text.erb
new file mode 100644
index 0000000..65690b9
--- /dev/null
+++ b/app/views/user_mailer/notify_for_invitation.text.erb
@@ -0,0 +1,8 @@
+You are invited to manage <%= @invitation.host.fqdn %> 's Bacula policy
+
+To accept the invitation please follow the following link
+
+<%= accept_invitation_url(@invitation.accept_hash) %>
+
+---------
+Archiving