diff --git a/src/backend/core/api/openapi.json b/src/backend/core/api/openapi.json
index 0502fe29..bdf90cee 100644
--- a/src/backend/core/api/openapi.json
+++ b/src/backend/core/api/openapi.json
@@ -2689,6 +2689,19 @@
                 "operationId": "mailboxes_message_templates_render_retrieve",
                 "description": "Render a template with the provided context variables.",
                 "parameters": [
+                    {
+                        "in": "query",
+                        "name": "*",
+                        "schema": {
+                            "type": "string"
+                        },
+                        "description": "Any other parameter will be available in the template context",
+                        "examples": {
+                            "Example": {
+                                "value": "value"
+                            }
+                        }
+                    },
                     {
                         "in": "path",
                         "name": "id",
diff --git a/src/backend/core/api/viewsets/message_template.py b/src/backend/core/api/viewsets/message_template.py
index 7d5786d0..2c22fdd8 100644
--- a/src/backend/core/api/viewsets/message_template.py
+++ b/src/backend/core/api/viewsets/message_template.py
@@ -4,6 +4,7 @@ from django.db.models import Q
 from django.utils.functional import cached_property
 
 from drf_spectacular.utils import (
+    OpenApiExample,
     OpenApiParameter,
     OpenApiResponse,
     OpenApiTypes,
@@ -75,6 +76,16 @@ class MailboxMessageTemplateViewSet(
         return context
 
     @extend_schema(
+        parameters=[
+            OpenApiParameter(
+                name="*",
+                type=OpenApiTypes.STR,
+                location=OpenApiParameter.QUERY,
+                description="Any other parameter will be available in the template context",
+                required=False,
+                examples=[OpenApiExample("Example", value="value")],
+            )
+        ],
         responses={
             200: OpenApiResponse(
                 description="Template rendered with provided context",
@@ -95,7 +106,11 @@ class MailboxMessageTemplateViewSet(
         """Render a template."""
         template = self.get_object()
         try:
-            rendered = template.render_template(mailbox=self.mailbox, user=request.user)
+            rendered = template.render_template(
+                mailbox=self.mailbox,
+                user=request.user,
+                context=request.query_params.dict(),
+            )
             return Response(rendered)
         except (KeyError, ValueError, TypeError) as e:
             return Response(
diff --git a/src/backend/core/models.py b/src/backend/core/models.py
index a241e75b..9134628a 100644
--- a/src/backend/core/models.py
+++ b/src/backend/core/models.py
@@ -1,7 +1,7 @@
 """
 Declare and configure the models for the messages core application
 """
-# pylint: disable=too-many-lines,too-many-instance-attributes
+# pylint: disable=too-many-lines,too-many-instance-attributes,dangerous-default-value
 
 import base64
 import hashlib
@@ -1822,7 +1822,10 @@ class MessageTemplate(BaseModel):
             return None
 
     def render_template(
-        self, mailbox: Mailbox = None, user: User = None
+        self,
+        mailbox: Mailbox = None,
+        user: User = None,
+        context: Dict[str, Any] = {},  # noqa: B006
     ) -> Dict[str, str]:
         """
         Render the template with the given context.
@@ -1834,12 +1837,12 @@ class MessageTemplate(BaseModel):
         Returns:
             Dictionary with 'html_body' and 'text_body' keys containing rendered content
         """
-        name = (
+        context = context.copy()
+        context["name"] = (
             mailbox.contact.name
             if mailbox and mailbox.contact
             else (getattr(user, "full_name", None) if user else "")
         )
-        context = {"name": name}
         schema = settings.SCHEMA_CUSTOM_ATTRIBUTES_USER
         schema_properties = schema.get("properties", {})
 
diff --git a/src/backend/core/tests/api/test_message_template_render.py b/src/backend/core/tests/api/test_message_template_render.py
index c58f387b..af1d6287 100644
--- a/src/backend/core/tests/api/test_message_template_render.py
+++ b/src/backend/core/tests/api/test_message_template_render.py
@@ -164,6 +164,44 @@ class TestMessageTemplateRender:
         assert "Cordialement, John Doe - Adjointe" in response.data["html_body"]
         assert "Cordialement, John Doe - Adjointe" in response.data["text_body"]
 
+    @patch(
+        "django.conf.settings.SCHEMA_CUSTOM_ATTRIBUTES_USER",
+        {"properties": {"job_title": {"type": "string"}}},
+    )
+    @pytest.mark.parametrize(
+        "role",
+        [
+            models.MailboxRoleChoices.EDITOR,
+            models.MailboxRoleChoices.SENDER,
+            models.MailboxRoleChoices.VIEWER,
+            models.MailboxRoleChoices.ADMIN,
+        ],
+    )
+    def test_success_with_context(self, user, mailbox, role):
+        """Test successful template rendering with context."""
+        factories.MailboxAccessFactory(
+            mailbox=mailbox,
+            user=user,
+            role=role,
+        )
+        template_reply = factories.MessageTemplateFactory(
+            html_body="<p>Hello {recipient_name}!</p><p> My name is {name} and I'm {job_title}.</p>",
+            text_body="Hello {recipient_name}! My name is {name} and I'm {job_title}.",
+            mailbox=mailbox,
+        )
+        client = APIClient()
+        client.force_authenticate(user=user)
+        url = reverse(
+            "mailbox-message-templates-render-template",
+            kwargs={"mailbox_id": mailbox.id, "pk": template_reply.id},
+        )
+        response = client.get(f"{url}?recipient_name=Jane Smith")
+        assert response.status_code == status.HTTP_200_OK
+        assert "Hello Jane Smith!" in response.data["html_body"]
+        assert "Hello Jane Smith!" in response.data["text_body"]
+        assert "My name is John Doe and I'm Adjointe." in response.data["html_body"]
+        assert "My name is John Doe and I'm Adjointe." in response.data["text_body"]
+
     def test_render_template_no_access_mailbox(self, user, mailbox):
         """Test rendering a template from a mailbox that doesn't exist."""
         client = APIClient()
diff --git a/src/frontend/src/features/api/gen/mailboxes/mailboxes.ts b/src/frontend/src/features/api/gen/mailboxes/mailboxes.ts
index 354ee397..33face90 100644
--- a/src/frontend/src/features/api/gen/mailboxes/mailboxes.ts
+++ b/src/frontend/src/features/api/gen/mailboxes/mailboxes.ts
@@ -27,6 +27,7 @@ import type {
   MailboxesMessageTemplatesAvailableListParams,
   MailboxesMessageTemplatesListParams,
   MailboxesMessageTemplatesRenderRetrieve200,
+  MailboxesMessageTemplatesRenderRetrieveParams,
   MailboxesSearchListParams,
   MessageTemplate,
   MessageTemplateRequest,
@@ -1070,17 +1071,31 @@ export type mailboxesMessageTemplatesRenderRetrieveResponse =
 export const getMailboxesMessageTemplatesRenderRetrieveUrl = (
   mailboxId: string,
   id: string,
+  params?: MailboxesMessageTemplatesRenderRetrieveParams,
 ) => {
-  return `/api/v1.0/mailboxes/${mailboxId}/message-templates/${id}/render/`;
+  const normalizedParams = new URLSearchParams();
+
+  Object.entries(params || {}).forEach(([key, value]) => {
+    if (value !== undefined) {
+      normalizedParams.append(key, value === null ? "null" : value.toString());
+    }
+  });
+
+  const stringifiedParams = normalizedParams.toString();
+
+  return stringifiedParams.length > 0
+    ? `/api/v1.0/mailboxes/${mailboxId}/message-templates/${id}/render/?${stringifiedParams}`
+    : `/api/v1.0/mailboxes/${mailboxId}/message-templates/${id}/render/`;
 };
 
 export const mailboxesMessageTemplatesRenderRetrieve = async (
   mailboxId: string,
   id: string,
+  params?: MailboxesMessageTemplatesRenderRetrieveParams,
   options?: RequestInit,
 ): Promise<mailboxesMessageTemplatesRenderRetrieveResponse> => {
   return fetchAPI<mailboxesMessageTemplatesRenderRetrieveResponse>(
-    getMailboxesMessageTemplatesRenderRetrieveUrl(mailboxId, id),
+    getMailboxesMessageTemplatesRenderRetrieveUrl(mailboxId, id, params),
     {
       ...options,
       method: "GET",
@@ -1091,9 +1106,11 @@ export const mailboxesMessageTemplatesRenderRetrieve = async (
 export const getMailboxesMessageTemplatesRenderRetrieveQueryKey = (
   mailboxId: string,
   id: string,
+  params?: MailboxesMessageTemplatesRenderRetrieveParams,
 ) => {
   return [
     `/api/v1.0/mailboxes/${mailboxId}/message-templates/${id}/render/`,
+    ...(params ? [params] : []),
   ] as const;
 };
 
@@ -1103,6 +1120,7 @@ export const getMailboxesMessageTemplatesRenderRetrieveQueryOptions = <
 >(
   mailboxId: string,
   id: string,
+  params?: MailboxesMessageTemplatesRenderRetrieveParams,
   options?: {
     query?: Partial<
       UseQueryOptions<
@@ -1118,12 +1136,12 @@ export const getMailboxesMessageTemplatesRenderRetrieveQueryOptions = <
 
   const queryKey =
     queryOptions?.queryKey ??
-    getMailboxesMessageTemplatesRenderRetrieveQueryKey(mailboxId, id);
+    getMailboxesMessageTemplatesRenderRetrieveQueryKey(mailboxId, id, params);
 
   const queryFn: QueryFunction<
     Awaited<ReturnType<typeof mailboxesMessageTemplatesRenderRetrieve>>
   > = ({ signal }) =>
-    mailboxesMessageTemplatesRenderRetrieve(mailboxId, id, {
+    mailboxesMessageTemplatesRenderRetrieve(mailboxId, id, params, {
       signal,
       ...requestOptions,
     });
@@ -1151,6 +1169,7 @@ export function useMailboxesMessageTemplatesRenderRetrieve<
 >(
   mailboxId: string,
   id: string,
+  params: undefined | MailboxesMessageTemplatesRenderRetrieveParams,
   options: {
     query: Partial<
       UseQueryOptions<
@@ -1179,6 +1198,7 @@ export function useMailboxesMessageTemplatesRenderRetrieve<
 >(
   mailboxId: string,
   id: string,
+  params?: MailboxesMessageTemplatesRenderRetrieveParams,
   options?: {
     query?: Partial<
       UseQueryOptions<
@@ -1207,6 +1227,7 @@ export function useMailboxesMessageTemplatesRenderRetrieve<
 >(
   mailboxId: string,
   id: string,
+  params?: MailboxesMessageTemplatesRenderRetrieveParams,
   options?: {
     query?: Partial<
       UseQueryOptions<
@@ -1228,6 +1249,7 @@ export function useMailboxesMessageTemplatesRenderRetrieve<
 >(
   mailboxId: string,
   id: string,
+  params?: MailboxesMessageTemplatesRenderRetrieveParams,
   options?: {
     query?: Partial<
       UseQueryOptions<
@@ -1245,6 +1267,7 @@ export function useMailboxesMessageTemplatesRenderRetrieve<
   const queryOptions = getMailboxesMessageTemplatesRenderRetrieveQueryOptions(
     mailboxId,
     id,
+    params,
     options,
   );
 
diff --git a/src/frontend/src/features/api/gen/models/index.ts b/src/frontend/src/features/api/gen/models/index.ts
index 3f7e1c52..2227992a 100644
--- a/src/frontend/src/features/api/gen/models/index.ts
+++ b/src/frontend/src/features/api/gen/models/index.ts
@@ -70,6 +70,7 @@ export * from "./mailboxes_message_templates_available_list_type";
 export * from "./mailboxes_message_templates_list_params";
 export * from "./mailboxes_message_templates_list_type_item";
 export * from "./mailboxes_message_templates_render_retrieve200";
+export * from "./mailboxes_message_templates_render_retrieve_params";
 export * from "./mailboxes_search_list_params";
 export * from "./maildomain_access_read";
 export * from "./maildomain_access_write";
diff --git a/src/frontend/src/features/api/gen/models/mailboxes_message_templates_render_retrieve_params.ts b/src/frontend/src/features/api/gen/models/mailboxes_message_templates_render_retrieve_params.ts
new file mode 100644
index 00000000..a10c1f41
--- /dev/null
+++ b/src/frontend/src/features/api/gen/models/mailboxes_message_templates_render_retrieve_params.ts
@@ -0,0 +1,14 @@
+/**
+ * Generated by orval v7.10.0 🍺
+ * Do not edit manually.
+ * messages API
+ * This is the messages API schema.
+ * OpenAPI spec version: 1.0.0 (v1.0)
+ */
+
+export type MailboxesMessageTemplatesRenderRetrieveParams = {
+  /**
+   * Any other parameter will be available in the template context
+   */
+  "*"?: string;
+};
diff --git a/src/frontend/src/features/blocknote/message-template-block/index.tsx b/src/frontend/src/features/blocknote/message-template-block/index.tsx
index 54b10fa6..cd7878da 100644
--- a/src/frontend/src/features/blocknote/message-template-block/index.tsx
+++ b/src/frontend/src/features/blocknote/message-template-block/index.tsx
@@ -2,19 +2,20 @@ import { useBlockNoteEditor, useComponentsContext } from "@blocknote/react";
 import { useTranslation } from "react-i18next";
 import { Icon, IconSize, Spinner } from "@gouvfr-lasuite/ui-kit";
 import { Modal, ModalSize } from "@openfun/cunningham-react";
-import { MessageTemplateTypeChoices, ReadOnlyMessageTemplate, useMailboxesMessageTemplatesAvailableList, mailboxesMessageTemplatesRenderRetrieve } from "@/features/api/gen";
+import { MessageTemplateTypeChoices, ReadOnlyMessageTemplate, useMailboxesMessageTemplatesAvailableList, mailboxesMessageTemplatesRenderRetrieve, MailboxesMessageTemplatesRenderRetrieveParams } from "@/features/api/gen";
 import { MessageComposerBlockSchema, MessageComposerInlineContentSchema, MessageComposerStyleSchema, PartialMessageComposerBlockSchema } from "@/features/forms/components/message-composer";
 import { useModal } from "@openfun/cunningham-react";
 
 type MessageTemplateSelectorProps = {
     mailboxId: string;
+    context?: Record<string, string>;
 }
 
 /**
  * A BlockNote toolbar selector which allows the user to select a message template
  * from all active templates for a given mailbox.
  */
-export const MessageTemplateSelector = ({ mailboxId }: MessageTemplateSelectorProps) => {
+export const MessageTemplateSelector = ({ mailboxId, context = {} }: MessageTemplateSelectorProps) => {
     const { t } = useTranslation();
     const editor = useBlockNoteEditor<MessageComposerBlockSchema, MessageComposerInlineContentSchema, MessageComposerStyleSchema>();
     const Components = useComponentsContext()!;
@@ -35,7 +36,8 @@ export const MessageTemplateSelector = ({ mailboxId }: MessageTemplateSelectorPr
             // Get rendered template content (allows to use placeholders)
             const { data: renderedTemplate } = await mailboxesMessageTemplatesRenderRetrieve(
                 mailboxId,
-                template.id
+                template.id,
+                context as MailboxesMessageTemplatesRenderRetrieveParams,
             );
             if (!renderedTemplate?.html_body) {
                 console.error("Failed to render template");
diff --git a/src/frontend/src/features/blocknote/signature-block/index.tsx b/src/frontend/src/features/blocknote/signature-block/index.tsx
index 9f7e85d9..8b4ea9ed 100644
--- a/src/frontend/src/features/blocknote/signature-block/index.tsx
+++ b/src/frontend/src/features/blocknote/signature-block/index.tsx
@@ -154,6 +154,7 @@ export const BlockSignature = createReactBlockSpec(
             const { data: { data: preview = null } = {}, isLoading } = useMailboxesMessageTemplatesRenderRetrieve(
                 props.mailboxId,
                 props.templateId,
+                {},
                 {
                     query: {
                         enabled: !!props.mailboxId && !!props.templateId,
diff --git a/src/frontend/src/features/forms/components/message-composer/index.tsx b/src/frontend/src/features/forms/components/message-composer/index.tsx
index bc6f4e64..b747ffee 100644
--- a/src/frontend/src/features/forms/components/message-composer/index.tsx
+++ b/src/frontend/src/features/forms/components/message-composer/index.tsx
@@ -212,6 +212,11 @@ export const MessageComposer = ({ mailboxId, blockNoteOptions, defaultValue, quo
                 <Toolbar>
                     <MessageTemplateSelector
                         mailboxId={mailboxId}
+                        context={{
+                            recipient_name: draft
+                                ? draft.to.map(to => to.contact.name).join(", ")
+                                : quotedMessage?.sender?.name || ""
+                        }}
                     />
                     <SignatureTemplateSelector
                         templates={activeSignatures}