diff --git a/lib/Entities/NewsletterEntity.php b/lib/Entities/NewsletterEntity.php
new file mode 100644
index 0000000000..3c94e7475b
--- /dev/null
+++ b/lib/Entities/NewsletterEntity.php
@@ -0,0 +1,330 @@
+<?php
+
+namespace MailPoet\Entities;
+
+use DateTimeInterface;
+use MailPoet\Doctrine\EntityTraits\AutoincrementedIdTrait;
+use MailPoet\Doctrine\EntityTraits\CreatedAtTrait;
+use MailPoet\Doctrine\EntityTraits\DeletedAtTrait;
+use MailPoet\Doctrine\EntityTraits\UpdatedAtTrait;
+use MailPoetVendor\Doctrine\Common\Collections\ArrayCollection;
+use MailPoetVendor\Doctrine\Common\Collections\Collection;
+use MailPoetVendor\Doctrine\ORM\Mapping\Column;
+
+/**
+ * @Entity()
+ * @Table(name="newsletters")
+ */
+class NewsletterEntity {
+  // types
+  const TYPE_AUTOMATIC = 'automatic';
+  const TYPE_STANDARD = 'standard';
+  const TYPE_WELCOME = 'welcome';
+  const TYPE_NOTIFICATION = 'notification';
+  const TYPE_NOTIFICATION_HISTORY = 'notification_history';
+
+  // standard newsletters
+  const STATUS_DRAFT = 'draft';
+  const STATUS_SCHEDULED = 'scheduled';
+  const STATUS_SENDING = 'sending';
+  const STATUS_SENT = 'sent';
+
+  // automatic newsletters status
+  const STATUS_ACTIVE = 'active';
+
+  use AutoincrementedIdTrait;
+  use CreatedAtTrait;
+  use UpdatedAtTrait;
+  use DeletedAtTrait;
+
+  /**
+   * @Column(type="string")
+   * @var string|null
+   */
+  private $hash;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $subject;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $type;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $sender_address;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $sender_name;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $status = self::STATUS_DRAFT;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $reply_to_address;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $reply_to_name;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $preheader;
+
+  /**
+   * @Column(type="json")
+   * @var array|null
+   */
+  private $body;
+
+  /**
+   * @Column(type="datetimetz")
+   * @var DateTimeInterface|null
+   */
+  private $sent_at;
+
+  /**
+   * @Column(type="string")
+   * @var string|null
+   */
+  private $unsubscribe_token;
+
+  /**
+   * @ManyToOne(targetEntity="MailPoet\Entities\NewsletterEntity")
+   * @var NewsletterEntity|null
+   */
+  private $parent;
+
+  /**
+   * @OneToMany(targetEntity="MailPoet\Entities\NewsletterSegmentEntity", mappedBy="newsletter")
+   * @var NewsletterSegmentEntity[]|Collection
+   */
+  private $newsletter_segments;
+
+  /**
+   * @OneToMany(targetEntity="MailPoet\Entities\NewsletterOptionEntity", mappedBy="newsletter")
+   * @var NewsletterOptionEntity[]|Collection
+   */
+  private $options;
+
+  function __construct() {
+    $this->newsletter_segments = new ArrayCollection();
+    $this->options = new ArrayCollection();
+  }
+
+  /**
+   * @return string|null
+   */
+  function getHash() {
+    return $this->hash;
+  }
+
+  /**
+   * @param string|null $hash
+   */
+  function setHash($hash) {
+    $this->hash = $hash;
+  }
+
+  /**
+   * @return string
+   */
+  function getSubject() {
+    return $this->subject;
+  }
+
+  /**
+   * @param string $subject
+   */
+  function setSubject($subject) {
+    $this->subject = $subject;
+  }
+
+  /**
+   * @return string
+   */
+  function getType() {
+    return $this->type;
+  }
+
+  /**
+   * @param string $type
+   */
+  function setType($type) {
+    $this->type = $type;
+  }
+
+  /**
+   * @return string
+   */
+  function getSenderAddress() {
+    return $this->sender_address;
+  }
+
+  /**
+   * @param string $sender_address
+   */
+  function setSenderAddress($sender_address) {
+    $this->sender_address = $sender_address;
+  }
+
+  /**
+   * @return string
+   */
+  function getSenderName() {
+    return $this->sender_name;
+  }
+
+  /**
+   * @param string $sender_name
+   */
+  function setSenderName($sender_name) {
+    $this->sender_name = $sender_name;
+  }
+
+  /**
+   * @return string
+   */
+  function getStatus() {
+    return $this->status;
+  }
+
+  /**
+   * @param string $status
+   */
+  function setStatus($status) {
+    $this->status = $status;
+  }
+
+  /**
+   * @return string
+   */
+  function getReplyToAddress() {
+    return $this->reply_to_address;
+  }
+
+  /**
+   * @param string $reply_to_address
+   */
+  function setReplyToAddress($reply_to_address) {
+    $this->reply_to_address = $reply_to_address;
+  }
+
+  /**
+   * @return string
+   */
+  function getReplyToName() {
+    return $this->reply_to_name;
+  }
+
+  /**
+   * @param string $reply_to_name
+   */
+  function setReplyToName($reply_to_name) {
+    $this->reply_to_name = $reply_to_name;
+  }
+
+  /**
+   * @return string
+   */
+  function getPreheader() {
+    return $this->preheader;
+  }
+
+  /**
+   * @param string $preheader
+   */
+  function setPreheader($preheader) {
+    $this->preheader = $preheader;
+  }
+
+  /**
+   * @return array|null
+   */
+  function getBody() {
+    return $this->body;
+  }
+
+  /**
+   * @param array|null $body
+   */
+  function setBody($body) {
+    $this->body = $body;
+  }
+
+  /**
+   * @return DateTimeInterface|null
+   */
+  function getSentAt() {
+    return $this->sent_at;
+  }
+
+  /**
+   * @param DateTimeInterface|null $sent_at
+   */
+  function setSentAt($sent_at) {
+    $this->sent_at = $sent_at;
+  }
+
+  /**
+   * @return string|null
+   */
+  function getUnsubscribeToken() {
+    return $this->unsubscribe_token;
+  }
+
+  /**
+   * @param string|null $unsubscribe_token
+   */
+  function setUnsubscribeToken($unsubscribe_token) {
+    $this->unsubscribe_token = $unsubscribe_token;
+  }
+
+  /**
+   * @return NewsletterEntity|null
+   */
+  function getParent() {
+    return $this->parent;
+  }
+
+  /**
+   * @param NewsletterEntity|null $parent
+   */
+  function setParent($parent) {
+    $this->parent = $parent;
+  }
+
+  /**
+   * @return NewsletterSegmentEntity[]|Collection
+   */
+  function getNewsletterSegments() {
+    return $this->newsletter_segments;
+  }
+
+  /**
+   * @return NewsletterOptionEntity[]|Collection
+   */
+  function getOptions() {
+    return $this->options;
+  }
+}
diff --git a/lib/Entities/NewsletterOptionEntity.php b/lib/Entities/NewsletterOptionEntity.php
new file mode 100644
index 0000000000..e265952b48
--- /dev/null
+++ b/lib/Entities/NewsletterOptionEntity.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace MailPoet\Entities;
+
+use MailPoet\Doctrine\EntityTraits\AutoincrementedIdTrait;
+use MailPoet\Doctrine\EntityTraits\CreatedAtTrait;
+use MailPoet\Doctrine\EntityTraits\UpdatedAtTrait;
+
+/**
+ * @Entity()
+ * @Table(name="newsletter_option")
+ */
+class NewsletterOptionEntity {
+  use AutoincrementedIdTrait;
+  use CreatedAtTrait;
+  use UpdatedAtTrait;
+
+  /**
+   * @Column(type="text")
+   * @var string|null
+   */
+  private $value;
+
+  /**
+   * @ManyToOne(targetEntity="MailPoet\Entities\NewsletterEntity", inversedBy="options")
+   * @var NewsletterEntity
+   */
+  private $newsletter;
+
+  /**
+   * @ManyToOne(targetEntity="MailPoet\Entities\NewsletterOptionFieldEntity", inversedBy="options")
+   * @var NewsletterOptionFieldEntity
+   */
+  private $option_field;
+
+  /**
+   * @return string|null
+   */
+  function getValue() {
+    return $this->value;
+  }
+
+  /**
+   * @param string|null $value
+   */
+  function setValue($value) {
+    $this->value = $value;
+  }
+
+  /**
+   * @return NewsletterEntity
+   */
+  function getNewsletter() {
+    return $this->newsletter;
+  }
+
+  /**
+   * @param NewsletterEntity $newsletter
+   */
+  function setNewsletter($newsletter) {
+    $this->newsletter = $newsletter;
+  }
+
+  /**
+   * @return NewsletterOptionFieldEntity
+   */
+  function getOptionField() {
+    return $this->option_field;
+  }
+
+  /**
+   * @param NewsletterOptionFieldEntity $option_field
+   */
+  function setOptionField($option_field) {
+    $this->option_field = $option_field;
+  }
+}
diff --git a/lib/Entities/NewsletterOptionFieldEntity.php b/lib/Entities/NewsletterOptionFieldEntity.php
new file mode 100644
index 0000000000..4188841165
--- /dev/null
+++ b/lib/Entities/NewsletterOptionFieldEntity.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace MailPoet\Entities;
+
+use MailPoet\Doctrine\EntityTraits\AutoincrementedIdTrait;
+use MailPoet\Doctrine\EntityTraits\CreatedAtTrait;
+use MailPoet\Doctrine\EntityTraits\UpdatedAtTrait;
+
+/**
+ * @Entity()
+ * @Table(name="newsletter_option_fields")
+ */
+class NewsletterOptionFieldEntity {
+  use AutoincrementedIdTrait;
+  use CreatedAtTrait;
+  use UpdatedAtTrait;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $name;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $newsletter_type;
+
+  /**
+   * @return string
+   */
+  function getName() {
+    return $this->name;
+  }
+
+  /**
+   * @param string $name
+   */
+  function setName($name) {
+    $this->name = $name;
+  }
+
+  /**
+   * @return string
+   */
+  function getNewsletterType() {
+    return $this->newsletter_type;
+  }
+
+  /**
+   * @param string $newsletter_type
+   */
+  function setNewsletterType($newsletter_type) {
+    $this->newsletter_type = $newsletter_type;
+  }
+}
diff --git a/lib/Entities/NewsletterSegmentEntity.php b/lib/Entities/NewsletterSegmentEntity.php
new file mode 100644
index 0000000000..37d7020c15
--- /dev/null
+++ b/lib/Entities/NewsletterSegmentEntity.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace MailPoet\Entities;
+
+use MailPoet\Doctrine\EntityTraits\AutoincrementedIdTrait;
+use MailPoet\Doctrine\EntityTraits\CreatedAtTrait;
+use MailPoet\Doctrine\EntityTraits\UpdatedAtTrait;
+
+/**
+ * @Entity()
+ * @Table(name="newsletter_segment")
+ */
+class NewsletterSegmentEntity {
+  use AutoincrementedIdTrait;
+  use CreatedAtTrait;
+  use UpdatedAtTrait;
+
+  /**
+   * @ManyToOne(targetEntity="MailPoet\Entities\NewsletterEntity", inversedBy="newsletter_segments")
+   * @var NewsletterEntity
+   */
+  private $newsletter;
+
+  /**
+   * @ManyToOne(targetEntity="MailPoet\Entities\SegmentEntity")
+   * @var SegmentEntity
+   */
+  private $segment;
+
+  /**
+   * @return NewsletterEntity
+   */
+  function getNewsletter() {
+    return $this->newsletter;
+  }
+
+  function setNewsletter(NewsletterEntity $newsletter) {
+    $this->newsletter = $newsletter;
+  }
+
+  /**
+   * @return SegmentEntity
+   */
+  function getSegment() {
+    return $this->segment;
+  }
+
+  function setSegment(SegmentEntity $segment) {
+    $this->segment = $segment;
+  }
+}
diff --git a/lib/Entities/SegmentEntity.php b/lib/Entities/SegmentEntity.php
new file mode 100644
index 0000000000..a65f0dd463
--- /dev/null
+++ b/lib/Entities/SegmentEntity.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace MailPoet\Entities;
+
+use MailPoet\Doctrine\EntityTraits\AutoincrementedIdTrait;
+use MailPoet\Doctrine\EntityTraits\CreatedAtTrait;
+use MailPoet\Doctrine\EntityTraits\DeletedAtTrait;
+use MailPoet\Doctrine\EntityTraits\UpdatedAtTrait;
+
+/**
+ * @Entity()
+ * @Table(name="segments")
+ */
+class SegmentEntity {
+  use AutoincrementedIdTrait;
+  use CreatedAtTrait;
+  use UpdatedAtTrait;
+  use DeletedAtTrait;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $name;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $type;
+
+  /**
+   * @Column(type="string")
+   * @var string
+   */
+  private $description;
+
+  /**
+   * @return string
+   */
+  function getName() {
+    return $this->name;
+  }
+
+  /**
+   * @param string $name
+   */
+  function setName($name) {
+    $this->name = $name;
+  }
+
+  /**
+   * @return string
+   */
+  function getType() {
+    return $this->type;
+  }
+
+  /**
+   * @param string $type
+   */
+  function setType($type) {
+    $this->type = $type;
+  }
+
+  /**
+   * @return string
+   */
+  function getDescription() {
+    return $this->description;
+  }
+
+  /**
+   * @param string $description
+   */
+  function setDescription($description) {
+    $this->description = $description;
+  }
+}
diff --git a/lib/Models/Newsletter.php b/lib/Models/Newsletter.php
index e19aea36fa..9910b22e6d 100644
--- a/lib/Models/Newsletter.php
+++ b/lib/Models/Newsletter.php
@@ -1,6 +1,7 @@
 <?php
 namespace MailPoet\Models;
 use Carbon\Carbon;
+use MailPoet\Entities\NewsletterEntity;
 use MailPoet\Newsletter\Renderer\Renderer;
 use MailPoet\Settings\SettingsController;
 use MailPoet\Tasks\Sending as SendingTask;
@@ -37,18 +38,18 @@ if (!defined('ABSPATH')) exit;
 
 class Newsletter extends Model {
   public static $_table = MP_NEWSLETTERS_TABLE;
-  const TYPE_AUTOMATIC = 'automatic';
-  const TYPE_STANDARD = 'standard';
-  const TYPE_WELCOME = 'welcome';
-  const TYPE_NOTIFICATION = 'notification';
-  const TYPE_NOTIFICATION_HISTORY = 'notification_history';
+  const TYPE_AUTOMATIC = NewsletterEntity::TYPE_AUTOMATIC;
+  const TYPE_STANDARD = NewsletterEntity::TYPE_STANDARD;
+  const TYPE_WELCOME = NewsletterEntity::TYPE_WELCOME;
+  const TYPE_NOTIFICATION = NewsletterEntity::TYPE_NOTIFICATION;
+  const TYPE_NOTIFICATION_HISTORY = NewsletterEntity::TYPE_NOTIFICATION_HISTORY;
   // standard newsletters
-  const STATUS_DRAFT = 'draft';
-  const STATUS_SCHEDULED = 'scheduled';
-  const STATUS_SENDING = 'sending';
-  const STATUS_SENT = 'sent';
+  const STATUS_DRAFT = NewsletterEntity::STATUS_DRAFT;
+  const STATUS_SCHEDULED = NewsletterEntity::STATUS_SCHEDULED;
+  const STATUS_SENDING = NewsletterEntity::STATUS_SENDING;
+  const STATUS_SENT = NewsletterEntity::STATUS_SENT;
   // automatic newsletters status
-  const STATUS_ACTIVE = 'active';
+  const STATUS_ACTIVE = NewsletterEntity::STATUS_ACTIVE;
 
   private $emoji;