diff --git a/src/collective/volto/formsupport/adapters/post.py b/src/collective/volto/formsupport/adapters/post.py
index 575e18f..e9ade25 100644
--- a/src/collective/volto/formsupport/adapters/post.py
+++ b/src/collective/volto/formsupport/adapters/post.py
@@ -1,6 +1,9 @@
 from collective.volto.formsupport import _
 from collective.volto.formsupport.interfaces import ICaptchaSupport
 from collective.volto.formsupport.interfaces import IPostAdapter
+from collective.volto.formsupport.restapi.services.submit_form.field import (
+    construct_fields,
+)
 from collective.volto.formsupport.utils import get_blocks
 from collective.volto.otp.utils import validate_email_token
 from copy import deepcopy
@@ -31,6 +34,8 @@ def __init__(self, context, request):
         if self.block_id:
             self.block = self.get_block_data(block_id=self.block_id)
 
+        self.fields = self.format_fields()
+
     def __call__(self):
         """
         Avoid XSS injections and other attacks.
@@ -41,6 +46,9 @@ def __call__(self):
 
         self.validate_form()
 
+        for field in self.fields:
+            field.validate(request=self.request)
+
         return self.form_data
 
     def extract_data_from_request(self):
@@ -219,32 +227,25 @@ def filter_parameters(self):
         """
         do not send attachments fields.
         """
-        result = []
-
-        for field in self.block.get("subblocks", []):
-            if field.get("field_type", "") == "attachment":
-                continue
-
-            for item in self.form_data.get("data", []):
-                if item.get("field_id", "") == field.get("field_id", ""):
-                    result.append(item)
-
-        return result
+        return [field for field in self.fields if field.send_in_email]
 
     def format_fields(self):
-        fields = self.filter_parameters()
-        formatted_fields = []
-        field_ids = [field.get("field_id") for field in self.block.get("subblocks", [])]
-
-        for field in fields:
-            field_id = field.get("field_id", "")
-
-            if field_id:
-                field_index = field_ids.index(field_id)
-
-                if self.block["subblocks"][field_index].get("field_type") == "date":
-                    field["value"] = api.portal.get_localized_time(field["value"])
-
-            formatted_fields.append(field)
-
-        return formatted_fields
+        fields_data = []
+        for submitted_field in self.form_data.get("data", []):
+            # TODO: Review if fields submitted without a field_id should be included. Is breaking change if we remove it
+            if submitted_field.get("field_id") is None:
+                fields_data.append(submitted_field)
+                continue
+            for field in self.block.get("subblocks", []):
+                if field.get("id", field.get("field_id")) == submitted_field.get(
+                    "field_id"
+                ):
+                    fields_data.append(
+                        {
+                            **field,
+                            **submitted_field,
+                            "display_value_mapping": field.get("display_values"),
+                            "custom_field_id": self.block.get(field["field_id"]),
+                        }
+                    )
+        return construct_fields(fields_data)
diff --git a/src/collective/volto/formsupport/restapi/services/submit_form/post.py b/src/collective/volto/formsupport/restapi/services/submit_form/post.py
index d4d5df2..2a1a6ca 100644
--- a/src/collective/volto/formsupport/restapi/services/submit_form/post.py
+++ b/src/collective/volto/formsupport/restapi/services/submit_form/post.py
@@ -21,9 +21,6 @@
 from collective.volto.formsupport.interfaces import IFormDataStore
 from collective.volto.formsupport.interfaces import IPostAdapter
 from collective.volto.formsupport.interfaces import IPostEvent
-from collective.volto.formsupport.restapi.services.submit_form.field import (
-    construct_fields,
-)
 from collective.volto.formsupport.utils import get_blocks
 from plone.protect.interfaces import IDisableCSRFProtection
 from plone.registry.interfaces import IRegistry
@@ -76,29 +73,6 @@ def reply(self):
 
         notify(PostEventService(self.context, self.form_data))
 
-        # Construct self.fieldss
-        fields_data = []
-        for submitted_field in self.form_data.get("data", []):
-            # TODO: Review if fields submitted without a field_id should be included. Is breaking change if we remove it
-            if submitted_field.get("field_id") is None:
-                fields_data.append(submitted_field)
-                continue
-            for field in self.block.get("subblocks", []):
-                if field.get("id", field.get("field_id")) == submitted_field.get(
-                    "field_id"
-                ):
-                    fields_data.append(
-                        {
-                            **field,
-                            **submitted_field,
-                            "display_value_mapping": field.get("display_values"),
-                            "custom_field_id": self.block.get(field["field_id"]),
-                        }
-                    )
-        self.fields = construct_fields(fields_data)
-        for field in self.fields:
-            field.validate(request=self.request)
-
         if send_action or self.get_bcc():
             try:
                 self.send_data()
@@ -396,7 +370,7 @@ def attach_xml(self, msg):
         output = BytesIO()
         xmlRoot = Element("form")
 
-        for field in self.form_data_adapter.filter_parameters():
+        for field in self.form_data_adapter.format_fields():
             SubElement(xmlRoot, "field", name=field.field_id).text = str(
                 field.internal_value
             )