diff --git a/application/Espo/Core/FieldValidators/CurrencyType.php b/application/Espo/Core/FieldValidators/CurrencyType.php
index e2734f5692..e86ace1590 100644
--- a/application/Espo/Core/FieldValidators/CurrencyType.php
+++ b/application/Espo/Core/FieldValidators/CurrencyType.php
@@ -29,9 +29,6 @@
 
 namespace Espo\Core\FieldValidators;
 
-use \Espo\ORM\Entity;
-
 class CurrencyType extends FloatType
 {
-
 }
diff --git a/application/Espo/Core/FieldValidators/DateType.php b/application/Espo/Core/FieldValidators/DateType.php
new file mode 100644
index 0000000000..211c421e87
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/DateType.php
@@ -0,0 +1,38 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class DateType extends BaseType
+{
+    public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        return $entity->has($field) && $entity->get($field) !== null;
+    }
+}
diff --git a/application/Espo/Core/FieldValidators/DatetimeOptionalType.php b/application/Espo/Core/FieldValidators/DatetimeOptionalType.php
new file mode 100644
index 0000000000..7841bea02e
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/DatetimeOptionalType.php
@@ -0,0 +1,40 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class DatetimeOptionalType extends DatetimeType
+{
+    public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        if ($entity->has($field) && $entity->get($field) !== null) return true;
+        if ($entity->has($field . 'Date') && $entity->get($field . 'Date') !== null) return true;
+        return false;
+    }
+}
diff --git a/application/Espo/Core/FieldValidators/DatetimeType.php b/application/Espo/Core/FieldValidators/DatetimeType.php
new file mode 100644
index 0000000000..6f66ce956f
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/DatetimeType.php
@@ -0,0 +1,34 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class DatetimeType extends DateType
+{
+}
diff --git a/application/Espo/Core/FieldValidators/EmailType.php b/application/Espo/Core/FieldValidators/EmailType.php
new file mode 100644
index 0000000000..f9309435f1
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/EmailType.php
@@ -0,0 +1,70 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class EmailType extends BaseType
+{
+    public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        if ($entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null) return true;
+
+        $dataList = $entity->get($field . 'Data');
+        if (!is_array($dataList)) return false;
+
+        foreach ($dataList as $item) {
+            if (!empty($item->emailAddress)) return true;
+        }
+
+        return false;
+    }
+
+    public function checkEmailAddress(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        if ($entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null) {
+            $address = $entity->get($field);
+            if (!filter_var($address, FILTER_VALIDATE_EMAIL)) {
+                return false;
+            }
+        }
+
+        $dataList = $entity->get($field . 'Data');
+        if (is_array($dataList)) {
+            foreach ($dataList as $item) {
+                if (empty($item->emailAddress)) continue;
+                $address = $item->emailAddress;
+                if (!filter_var($address, FILTER_VALIDATE_EMAIL)) {
+                    return false;
+                }
+            }
+        }
+
+        return true;
+    }
+}
diff --git a/application/Espo/Core/FieldValidators/FileType.php b/application/Espo/Core/FieldValidators/FileType.php
new file mode 100644
index 0000000000..c0bbb0ccb3
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/FileType.php
@@ -0,0 +1,34 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class FileType extends LinkType
+{
+}
diff --git a/application/Espo/Core/FieldValidators/FloatType.php b/application/Espo/Core/FieldValidators/FloatType.php
index 6638212889..e72d5d0097 100644
--- a/application/Espo/Core/FieldValidators/FloatType.php
+++ b/application/Espo/Core/FieldValidators/FloatType.php
@@ -29,9 +29,6 @@
 
 namespace Espo\Core\FieldValidators;
 
-use \Espo\ORM\Entity;
-
 class FloatType extends IntType
 {
-
 }
diff --git a/application/Espo/Core/FieldValidators/ImageType.php b/application/Espo/Core/FieldValidators/ImageType.php
new file mode 100644
index 0000000000..da184df7a2
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/ImageType.php
@@ -0,0 +1,34 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class ImageType extends FileType
+{
+}
diff --git a/application/Espo/Core/FieldValidators/IntType.php b/application/Espo/Core/FieldValidators/IntType.php
index 6b5eef27ea..683fabd02c 100644
--- a/application/Espo/Core/FieldValidators/IntType.php
+++ b/application/Espo/Core/FieldValidators/IntType.php
@@ -29,12 +29,24 @@
 
 namespace Espo\Core\FieldValidators;
 
-use \Espo\ORM\Entity;
-
 class IntType extends BaseType
 {
     public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
     {
         return $entity->has($field) && $entity->get($field) !== null;
     }
+
+    public function checkMax(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        if (!$entity->has($field) || $entity->get($field) === null) return true;
+        if ($entity->get($field) > $validationValue) return false;
+        return true;
+    }
+
+    public function checkMin(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        if (!$entity->has($field) || $entity->get($field) === null) return true;
+        if ($entity->get($field) < $validationValue) return false;
+        return true;
+    }
 }
diff --git a/application/Espo/Core/FieldValidators/LinkMultipleType.php b/application/Espo/Core/FieldValidators/LinkMultipleType.php
new file mode 100644
index 0000000000..e95cc6398f
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/LinkMultipleType.php
@@ -0,0 +1,38 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class LinkMultipleType extends BaseType
+{
+    public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        return count($entity->getLinkMultipleIdList($field)) > 0;
+    }
+}
diff --git a/application/Espo/Core/FieldValidators/LinkParentType.php b/application/Espo/Core/FieldValidators/LinkParentType.php
new file mode 100644
index 0000000000..d7fd873aa6
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/LinkParentType.php
@@ -0,0 +1,49 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class LinkParentType extends BaseType
+{
+    public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        $idAttribute = $field . 'Id';
+        $typeAttribute = $field . 'Type';
+
+        if (!$entity->has($idAttribute) || $entity->get($idAttribute) === '' || $entity->get($idAttribute) === null) {
+            return false;
+        }
+
+        if (!$entity->get($typeAttribute)) {
+            return false;
+        }
+
+        return true;
+    }
+}
diff --git a/application/Espo/Core/FieldValidators/LinkType.php b/application/Espo/Core/FieldValidators/LinkType.php
new file mode 100644
index 0000000000..c803ea6178
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/LinkType.php
@@ -0,0 +1,44 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class LinkType extends BaseType
+{
+    public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        $idAttribute = $field . 'Id';
+
+        if (!$entity->has($idAttribute)) {
+            return false;
+        }
+
+        return $entity->get($idAttribute) !== null && $entity->get($idAttribute) !== '';
+    }
+}
diff --git a/application/Espo/Core/FieldValidators/PersonNameType.php b/application/Espo/Core/FieldValidators/PersonNameType.php
index e5c5b7eeb3..1162820eff 100644
--- a/application/Espo/Core/FieldValidators/PersonNameType.php
+++ b/application/Espo/Core/FieldValidators/PersonNameType.php
@@ -29,8 +29,6 @@
 
 namespace Espo\Core\FieldValidators;
 
-use \Espo\ORM\Entity;
-
 class PersonNameType extends BaseType
 {
     public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
diff --git a/application/Espo/Core/FieldValidators/PhoneType.php b/application/Espo/Core/FieldValidators/PhoneType.php
new file mode 100644
index 0000000000..ed895bd885
--- /dev/null
+++ b/application/Espo/Core/FieldValidators/PhoneType.php
@@ -0,0 +1,47 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2018 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: http://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\FieldValidators;
+
+class PhoneType extends BaseType
+{
+    public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        if ($entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null) return true;
+
+        $dataList = $entity->get($field . 'Data');
+        if (!is_array($dataList)) return false;
+
+        foreach ($dataList as $item) {
+            if (!empty($item->phoneNumber)) return true;
+        }
+
+        return false;
+    }
+}
diff --git a/application/Espo/Core/FieldValidators/VarcharType.php b/application/Espo/Core/FieldValidators/VarcharType.php
index a7b2715112..80281a3c15 100644
--- a/application/Espo/Core/FieldValidators/VarcharType.php
+++ b/application/Espo/Core/FieldValidators/VarcharType.php
@@ -29,12 +29,21 @@
 
 namespace Espo\Core\FieldValidators;
 
-use \Espo\ORM\Entity;
-
 class VarcharType extends BaseType
 {
     public function checkRequired(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
     {
-        return $entity->has($field) && $entity->get($field) !== '';
+        return $entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null;
+    }
+
+    public function checkMaxLength(\Espo\ORM\Entity $entity, string $field, $validationValue, $data) : bool
+    {
+        if ($entity->has($field) && $entity->get($field) !== '' && $entity->get($field) !== null) {
+            $value = $entity->get($field);
+            if (mb_strlen($value) > $validationValue) {
+                return false;
+            }
+        }
+        return true;
     }
 }
diff --git a/application/Espo/Core/Utils/FieldValidatorManager.php b/application/Espo/Core/Utils/FieldValidatorManager.php
index 0d9c2f3983..7603fb81aa 100644
--- a/application/Espo/Core/Utils/FieldValidatorManager.php
+++ b/application/Espo/Core/Utils/FieldValidatorManager.php
@@ -47,10 +47,16 @@ class FieldValidatorManager
     {
         if (!$data) $data = (object) [];
 
-        $validationValue = $this->fieldManagerUtil->getEntityTypeFieldParam($entity->getEntityType(), $field, $type);
-        if (is_null($validationValue) || $validationValue === false) return true;
-
         $fieldType = $this->fieldManagerUtil->getEntityTypeFieldParam($entity->getEntityType(), $field, 'type');
+
+        $validationValue = $this->fieldManagerUtil->getEntityTypeFieldParam($entity->getEntityType(), $field, $type);
+
+        $mandatoryValidationList = $this->metadata->get(['fields', $fieldType, 'mandatoryValidationList'], []);
+
+        if (!in_array($type, $mandatoryValidationList)) {
+            if (is_null($validationValue) || $validationValue === false) return true;
+        }
+
         if (!array_key_exists($fieldType, $this->implHash)) {
             $this->loadImpl($fieldType);
         }
diff --git a/application/Espo/Resources/metadata/fields/currency.json b/application/Espo/Resources/metadata/fields/currency.json
index 984b686b3d..564857653a 100644
--- a/application/Espo/Resources/metadata/fields/currency.json
+++ b/application/Espo/Resources/metadata/fields/currency.json
@@ -52,7 +52,11 @@
          "importDisabled": true
       }
    },
-   "validationList": ["required"],
+   "validationList": [
+      "required",
+      "min",
+      "max"
+   ],
    "filter": true,
    "personalData": true
 }
diff --git a/application/Espo/Resources/metadata/fields/date.json b/application/Espo/Resources/metadata/fields/date.json
index 6dd8d5088b..39e9feb7b4 100644
--- a/application/Espo/Resources/metadata/fields/date.json
+++ b/application/Espo/Resources/metadata/fields/date.json
@@ -61,6 +61,9 @@
          "type":"bool"
       }
    ],
+   "validationList": [
+      "required"
+   ],
    "filter": true,
    "fieldDefs":{
       "notNull":false
diff --git a/application/Espo/Resources/metadata/fields/datetime.json b/application/Espo/Resources/metadata/fields/datetime.json
index 2623d2c7d5..dd405fb5a5 100644
--- a/application/Espo/Resources/metadata/fields/datetime.json
+++ b/application/Espo/Resources/metadata/fields/datetime.json
@@ -68,6 +68,9 @@
          "type":"bool"
       }
    ],
+   "validationList": [
+      "required"
+   ],
    "filter": true,
    "fieldDefs":{
       "notNull":false
diff --git a/application/Espo/Resources/metadata/fields/datetimeOptional.json b/application/Espo/Resources/metadata/fields/datetimeOptional.json
index ac2f33d98f..fbc0b57026 100644
--- a/application/Espo/Resources/metadata/fields/datetimeOptional.json
+++ b/application/Espo/Resources/metadata/fields/datetimeOptional.json
@@ -73,6 +73,9 @@
          "disabled": true
       }
    },
+   "validationList": [
+      "required"
+   ],
    "filter": true,
    "notCreatable": true,
    "fieldDefs":{
diff --git a/application/Espo/Resources/metadata/fields/email.json b/application/Espo/Resources/metadata/fields/email.json
index 22753c3a90..64b037bb4e 100644
--- a/application/Espo/Resources/metadata/fields/email.json
+++ b/application/Espo/Resources/metadata/fields/email.json
@@ -28,6 +28,13 @@
          "customizationReadOnlyDisabled": true
       }
    },
+   "validationList": [
+      "required",
+      "emailAddress"
+   ],
+   "mandatoryValidationList": [
+      "emailAddress"
+   ],
    "notCreatable": true,
    "filter": true,
    "fieldDefs":{
diff --git a/application/Espo/Resources/metadata/fields/file.json b/application/Espo/Resources/metadata/fields/file.json
index 64fa97c7a4..1da2aa7d20 100644
--- a/application/Espo/Resources/metadata/fields/file.json
+++ b/application/Espo/Resources/metadata/fields/file.json
@@ -27,6 +27,9 @@
    "notActualFields":[
       "name"
    ],
+   "validationList": [
+      "required"
+   ],
    "filter": true,
    "linkDefs": {
       "type": "belongsTo",
diff --git a/application/Espo/Resources/metadata/fields/float.json b/application/Espo/Resources/metadata/fields/float.json
index d431d82737..82e2a8243c 100644
--- a/application/Espo/Resources/metadata/fields/float.json
+++ b/application/Espo/Resources/metadata/fields/float.json
@@ -26,7 +26,11 @@
          "type":"bool"
       }
    ],
-   "validationList": ["required"],
+   "validationList": [
+      "required",
+      "min",
+      "max"
+   ],
    "filter": true,
    "fieldDefs":{
       "notNull":false
diff --git a/application/Espo/Resources/metadata/fields/image.json b/application/Espo/Resources/metadata/fields/image.json
index 6b639524b5..75e5f6d9b3 100644
--- a/application/Espo/Resources/metadata/fields/image.json
+++ b/application/Espo/Resources/metadata/fields/image.json
@@ -28,6 +28,9 @@
    "notActualFields":[
       "name"
    ],
+   "validationList": [
+      "required"
+   ],
    "filter": true,
    "linkDefs": {
       "type": "belongsTo",
diff --git a/application/Espo/Resources/metadata/fields/int.json b/application/Espo/Resources/metadata/fields/int.json
index 12d60ce3b4..4b857ef298 100644
--- a/application/Espo/Resources/metadata/fields/int.json
+++ b/application/Espo/Resources/metadata/fields/int.json
@@ -30,7 +30,11 @@
          "type":"bool"
       }
    ],
-   "validationList": ["required"],
+   "validationList": [
+      "required",
+      "min",
+      "max"
+   ],
    "filter": true,
    "textFilter": true,
    "textFilterForeign": true,
diff --git a/application/Espo/Resources/metadata/fields/link.json b/application/Espo/Resources/metadata/fields/link.json
index 3fe894985f..88bca22ec6 100644
--- a/application/Espo/Resources/metadata/fields/link.json
+++ b/application/Espo/Resources/metadata/fields/link.json
@@ -25,6 +25,9 @@
    "notActualFields":[
       "name"
    ],
+   "validationList": [
+      "required"
+   ],
    "filter": true,
    "notCreatable": true
 }
diff --git a/application/Espo/Resources/metadata/fields/linkMultiple.json b/application/Espo/Resources/metadata/fields/linkMultiple.json
index e94ed672f8..a15c6a406a 100644
--- a/application/Espo/Resources/metadata/fields/linkMultiple.json
+++ b/application/Espo/Resources/metadata/fields/linkMultiple.json
@@ -22,6 +22,9 @@
    "notActualFields":[
       "names"
    ],
+   "validationList": [
+      "required"
+   ],
    "notCreatable": true,
    "notSortable": true,
    "filter": true
diff --git a/application/Espo/Resources/metadata/fields/linkParent.json b/application/Espo/Resources/metadata/fields/linkParent.json
index 2175db10d0..c787927f07 100644
--- a/application/Espo/Resources/metadata/fields/linkParent.json
+++ b/application/Espo/Resources/metadata/fields/linkParent.json
@@ -26,6 +26,9 @@
    "notActualFields":[
       "name"
    ],
+   "validationList": [
+      "required"
+   ],
    "filter": true,
    "notCreatable": true,
    "fieldDefs":{
diff --git a/application/Espo/Resources/metadata/fields/phone.json b/application/Espo/Resources/metadata/fields/phone.json
index d38aeaa85f..715b043586 100644
--- a/application/Espo/Resources/metadata/fields/phone.json
+++ b/application/Espo/Resources/metadata/fields/phone.json
@@ -39,6 +39,9 @@
          "customizationReadOnlyDisabled": true
       }
    },
+   "validationList": [
+      "required"
+   ],
    "notCreatable": true,
    "filter": true,
    "fieldDefs":{
diff --git a/application/Espo/Resources/metadata/fields/varchar.json b/application/Espo/Resources/metadata/fields/varchar.json
index 6ab066363e..276c64eef7 100644
--- a/application/Espo/Resources/metadata/fields/varchar.json
+++ b/application/Espo/Resources/metadata/fields/varchar.json
@@ -31,7 +31,10 @@
          "type":"bool"
       }
    ],
-   "validationList": ["required"],
+   "validationList": [
+      "required",
+      "maxLength"
+   ],
    "filter": true,
    "personalData": true,
    "textFilter": true,
diff --git a/application/Espo/Services/Record.php b/application/Espo/Services/Record.php
index 2d003eb2f1..9b0646c47a 100644
--- a/application/Espo/Services/Record.php
+++ b/application/Espo/Services/Record.php
@@ -507,25 +507,27 @@ class Record extends \Espo\Core\Services\Base
             if (!$entity->isNew()) {
                 if (!$this->isFieldSetInData($data, $field)) continue;
             }
-            $this->processDataValidationField($entity, $field, $data);
+            $this->processValidationField($entity, $field, $data);
         }
     }
 
-    protected function processDataValidationField(Entity $entity, $field, $data)
+    protected function processValidationField(Entity $entity, $field, $data)
     {
         $fieldType = $this->getFieldManagerUtil()->getEntityTypeFieldParam($this->entityType, $field, 'type');
-        if (!$fieldType) return;
-
+        $validationList = $this->getMetadata()->get(['fields', $fieldType, 'validationList'], []);
+        $mandatoryValidationList = $this->getMetadata()->get(['fields', $fieldType, 'mandatoryValidationList'], []);
         $fieldValidatorManager = $this->getInjection('container')->get('fieldValidatorManager');
 
-        $validationTypeList = $this->getMetadata()->get(['fields', $fieldType, 'validationList'], []);
 
-        foreach ($validationTypeList as $validationType) {
-            $validationValue = $this->getFieldManagerUtil()->getEntityTypeFieldParam($this->entityType, $field, $validationType);
-            if (is_null($validationValue)) continue;
-
-            if (!$fieldValidatorManager->check($entity, $field, $validationType, $validationValue, $data)) {
-                throw new BadRequest("Validation {$validationType}: {$field}.");
+        foreach ($validationList as $type) {
+            $value = $this->getFieldManagerUtil()->getEntityTypeFieldParam($this->entityType, $field, $type);
+            if (is_null($value)) {
+                if (!in_array($type, $mandatoryValidationList)) {
+                    continue;
+                }
+            }
+            if (!$fieldValidatorManager->check($entity, $field, $type, $data)) {
+                throw new BadRequest("Not valid data. Field: '{$field}', type: {$type}.");
             }
         }
     }