diff --git a/services/app/.iex.exs b/services/app/.iex.exs
index d33e5cf..b35e53b 100644
--- a/services/app/.iex.exs
+++ b/services/app/.iex.exs
@@ -2,3 +2,4 @@ import Ecto.Query
 alias HexletBasics.Repo
 alias HexletBasics.Language
 alias HexletBasics.User
+alias HexletBasics.UserManager
diff --git a/services/app/lib/hexlet_basics/state_machines/user/email_delivery_state_machine.ex b/services/app/lib/hexlet_basics/state_machines/user/email_delivery_state_machine.ex
new file mode 100644
index 0000000..7ec5a67
--- /dev/null
+++ b/services/app/lib/hexlet_basics/state_machines/user/email_delivery_state_machine.ex
@@ -0,0 +1,9 @@
+defmodule HexletBasics.StateMachines.User.EmailDeliveryStateMachine do
+  use Machinery,
+    field: :email_delivery_state,
+    states: ["enabled", "disabled"],
+    transitions: %{
+      "enabled" =>  "disabled",
+      "disabled" => "enabled"
+    }
+end
diff --git a/services/app/lib/hexlet_basics/user.ex b/services/app/lib/hexlet_basics/user.ex
index 097bcc8..d674f63 100644
--- a/services/app/lib/hexlet_basics/user.ex
+++ b/services/app/lib/hexlet_basics/user.ex
@@ -13,6 +13,7 @@ defmodule HexletBasics.User do
     field(:facebook_uid, :string)
     field(:nickname, :string)
     field(:state, :string, default: "initial")
+    field(:email_delivery_state, :string, default: "enabled")
     field(:encrypted_password, :string)
     field(:confirmation_token, :string)
     field(:reset_password_token, :string)
@@ -39,6 +40,10 @@ defmodule HexletBasics.User do
     user |> cast(attrs, [:state])
   end
 
+  def email_delivery_state_changeset(%User{} = user, attrs \\ %{}) do
+    user |> cast(attrs, [:email_delivery_state])
+  end
+
   def locale_changeset(%User{} = user, attrs \\ %{}) do
     user |> cast(attrs, [:locale])
   end
diff --git a/services/app/lib/hexlet_basics/user_manager.ex b/services/app/lib/hexlet_basics/user_manager.ex
index fafdd6d..9ed8ee2 100644
--- a/services/app/lib/hexlet_basics/user_manager.ex
+++ b/services/app/lib/hexlet_basics/user_manager.ex
@@ -1,6 +1,7 @@
 defmodule HexletBasics.UserManager do
   alias Bcrypt
-  alias HexletBasics.{User, User.Account, StateMachines.UserStateMachine}
+  alias HexletBasics.{User, User.Account}
+  alias HexletBasics.StateMachines.{UserStateMachine, User.EmailDeliveryStateMachine}
   import Ecto.Query, warn: false
   alias HexletBasics.Repo
 
@@ -75,6 +76,24 @@ defmodule HexletBasics.UserManager do
     |> Repo.insert()
   end
 
+  def disable_delivery!(user) do
+    {:ok, %User{email_delivery_state: state}} =
+      Machinery.transition_to(user, EmailDeliveryStateMachine, "disabled")
+
+    user
+    |> User.email_delivery_state_changeset(%{email_delivery_state: state})
+    |> Repo.update!()
+  end
+
+  def enable_delivery!(user) do
+    {:ok, %User{email_delivery_state: state}} =
+      Machinery.transition_to(user, EmailDeliveryStateMachine, "enabled")
+
+    user
+    |> User.email_delivery_state_changeset(%{email_delivery_state: state})
+    |> Repo.update!()
+  end
+
   defp activate_user!(user) do
     {:ok, %User{state: state}} =
       Machinery.transition_to(user, UserStateMachine, "active")
diff --git a/services/app/lib/hexlet_basics_web/router.ex b/services/app/lib/hexlet_basics_web/router.ex
index 8233040..cbc53b7 100644
--- a/services/app/lib/hexlet_basics_web/router.ex
+++ b/services/app/lib/hexlet_basics_web/router.ex
@@ -82,7 +82,7 @@ defmodule HexletBasicsWeb.Router do
   scope "/api/webhooks", HexletBasicsWeb do
     pipe_through(:api_for_webhooks)
 
-    post("sparkpost/process", Api.Webhooks.SparkpostController, :process)
+    post("/sparkpost/process", Api.Webhooks.SparkpostController, :process)
   end
 
   scope "/", HexletBasicsWeb do
diff --git a/services/app/priv/repo/migrations/20190911072227_add_email_delivery_state_to_user.exs b/services/app/priv/repo/migrations/20190911072227_add_email_delivery_state_to_user.exs
new file mode 100644
index 0000000..83b4939
--- /dev/null
+++ b/services/app/priv/repo/migrations/20190911072227_add_email_delivery_state_to_user.exs
@@ -0,0 +1,9 @@
+defmodule HexletBasics.Repo.Migrations.AddEmailDeliveryStateToUser do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users) do
+      add :email_delivery_state, :string
+    end
+  end
+end
diff --git a/services/app/priv/repo/migrations/20190911072926_migrate_email_deliviery_state_for_user.exs b/services/app/priv/repo/migrations/20190911072926_migrate_email_deliviery_state_for_user.exs
new file mode 100644
index 0000000..f729b43
--- /dev/null
+++ b/services/app/priv/repo/migrations/20190911072926_migrate_email_deliviery_state_for_user.exs
@@ -0,0 +1,7 @@
+defmodule HexletBasics.Repo.Migrations.MigrateEmailDelivieryStateForUser do
+  use Ecto.Migration
+
+  def change do
+    HexletBasics.Repo.update_all(HexletBasics.User, set: [email_delivery_state: "enabled"])
+  end
+end