diff --git a/superset-frontend/src/constants.ts b/superset-frontend/src/constants.ts
index e27022fe63ca..4444e8ea1f4a 100644
--- a/superset-frontend/src/constants.ts
+++ b/superset-frontend/src/constants.ts
@@ -59,6 +59,14 @@ export const URL_PARAMS = {
     name: 'form_data_key',
     type: 'string',
   },
+  sliceId: {
+    name: 'slice_id',
+    type: 'string',
+  },
+  datasetId: {
+    name: 'dataset_id',
+    type: 'string',
+  },
 } as const;
 
 /**
diff --git a/superset-frontend/src/dashboard/components/gridComponents/Chart.jsx b/superset-frontend/src/dashboard/components/gridComponents/Chart.jsx
index 70679600dffd..ba455188f70c 100644
--- a/superset-frontend/src/dashboard/components/gridComponents/Chart.jsx
+++ b/superset-frontend/src/dashboard/components/gridComponents/Chart.jsx
@@ -245,9 +245,12 @@ export default class Chart extends React.Component {
       const key = await postFormData(
         this.props.datasource.id,
         this.props.formData,
-        this.props.slice.id,
+        this.props.slice.slice_id,
       );
-      const url = mountExploreUrl(null, { [URL_PARAMS.formDataKey.name]: key });
+      const url = mountExploreUrl(null, {
+        [URL_PARAMS.formDataKey.name]: key,
+        [URL_PARAMS.sliceId.name]: this.props.slice.slice_id,
+      });
       window.open(url, '_blank', 'noreferrer');
     } catch (error) {
       logging.error(error);
diff --git a/superset-frontend/src/dashboard/components/menu/ShareMenuItems/ShareMenuItems.test.tsx b/superset-frontend/src/dashboard/components/menu/ShareMenuItems/ShareMenuItems.test.tsx
index 43b4188cd906..bdf22009efda 100644
--- a/superset-frontend/src/dashboard/components/menu/ShareMenuItems/ShareMenuItems.test.tsx
+++ b/superset-frontend/src/dashboard/components/menu/ShareMenuItems/ShareMenuItems.test.tsx
@@ -159,7 +159,7 @@ test('Click on "Share dashboard by email" and succeed', async () => {
   await waitFor(() => {
     expect(props.addDangerToast).toBeCalledTimes(0);
     expect(window.location.href).toBe(
-      'mailto:?Subject=Superset dashboard COVID Vaccine Dashboard%20&Body=Check out this dashboard: http://localhost:8088/r/3',
+      'mailto:?Subject=Superset%20dashboard%20COVID%20Vaccine%20Dashboard%20&Body=Check%20out%20this%20dashboard%3A%20http%3A%2F%2Flocalhost%3A8088%2Fr%2F3',
     );
   });
 });
diff --git a/superset-frontend/src/dashboard/components/menu/ShareMenuItems/index.tsx b/superset-frontend/src/dashboard/components/menu/ShareMenuItems/index.tsx
index ed77628bd46e..9518e3a4d62d 100644
--- a/superset-frontend/src/dashboard/components/menu/ShareMenuItems/index.tsx
+++ b/superset-frontend/src/dashboard/components/menu/ShareMenuItems/index.tsx
@@ -83,6 +83,7 @@ const ShareMenuItems = (props: ShareMenuItemProps) => {
       );
       return `${window.location.origin}${mountExploreUrl(null, {
         [URL_PARAMS.formDataKey.name]: key,
+        [URL_PARAMS.sliceId.name]: formData.slice_id,
       })}`;
     }
     const copyUrl = await getCopyUrl();
@@ -101,8 +102,11 @@ const ShareMenuItems = (props: ShareMenuItemProps) => {
 
   async function onShareByEmail() {
     try {
-      const bodyWithLink = `${emailBody}${await generateUrl()}`;
-      window.location.href = `mailto:?Subject=${emailSubject}%20&Body=${bodyWithLink}`;
+      const encodedBody = encodeURIComponent(
+        `${emailBody}${await generateUrl()}`,
+      );
+      const encodedSubject = encodeURIComponent(emailSubject);
+      window.location.href = `mailto:?Subject=${encodedSubject}%20&Body=${encodedBody}`;
     } catch (error) {
       logging.error(error);
       addDangerToast(t('Sorry, something went wrong. Try again later.'));
diff --git a/superset-frontend/src/explore/components/ExploreViewContainer/ExploreViewContainer.test.tsx b/superset-frontend/src/explore/components/ExploreViewContainer/ExploreViewContainer.test.tsx
index 527c5ffe7c8b..da815ca7dc32 100644
--- a/superset-frontend/src/explore/components/ExploreViewContainer/ExploreViewContainer.test.tsx
+++ b/superset-frontend/src/explore/components/ExploreViewContainer/ExploreViewContainer.test.tsx
@@ -28,6 +28,7 @@ const reduxState = {
     common: { conf: { SUPERSET_WEBSERVER_TIMEOUT: 60 } },
     controls: { datasource: { value: '1__table' } },
     datasource: {
+      id: 1,
       type: 'table',
       columns: [{ is_dttm: false }],
       metrics: [{ id: 1, metric_name: 'count' }],
@@ -65,7 +66,7 @@ fetchMock.get('glob:*/api/v1/explore/form_data*', {});
 
 const renderWithRouter = (withKey?: boolean) => {
   const path = '/superset/explore/';
-  const search = withKey ? `?form_data_key=${key}` : '';
+  const search = withKey ? `?form_data_key=${key}&dataset_id=1` : '';
   return render(
     <MemoryRouter initialEntries={[`${path}${search}`]}>
       <Route path={path}>
@@ -82,7 +83,12 @@ test('generates a new form_data param when none is available', async () => {
   expect(replaceState).toHaveBeenCalledWith(
     expect.anything(),
     undefined,
-    expect.stringMatching('form_data'),
+    expect.stringMatching('form_data_key'),
+  );
+  expect(replaceState).toHaveBeenCalledWith(
+    expect.anything(),
+    undefined,
+    expect.stringMatching('dataset_id'),
   );
   replaceState.mockRestore();
 });
@@ -96,6 +102,11 @@ test('generates a different form_data param when one is provided and is mounting
     undefined,
     expect.stringMatching(key),
   );
+  expect(replaceState).toHaveBeenCalledWith(
+    expect.anything(),
+    undefined,
+    expect.stringMatching('dataset_id'),
+  );
   replaceState.mockRestore();
 });
 
diff --git a/superset-frontend/src/explore/components/ExploreViewContainer/index.jsx b/superset-frontend/src/explore/components/ExploreViewContainer/index.jsx
index 780217bb664f..07c93253849a 100644
--- a/superset-frontend/src/explore/components/ExploreViewContainer/index.jsx
+++ b/superset-frontend/src/explore/components/ExploreViewContainer/index.jsx
@@ -167,6 +167,12 @@ const updateHistory = debounce(
   async (formData, datasetId, isReplace, standalone, force, title) => {
     const payload = { ...formData };
     const chartId = formData.slice_id;
+    const additionalParam = {};
+    if (chartId) {
+      additionalParam[URL_PARAMS.sliceId.name] = chartId;
+    } else {
+      additionalParam[URL_PARAMS.datasetId.name] = datasetId;
+    }
 
     try {
       let key;
@@ -183,6 +189,7 @@ const updateHistory = debounce(
         standalone ? URL_PARAMS.standalone.name : null,
         {
           [URL_PARAMS.formDataKey.name]: key,
+          ...additionalParam,
         },
         force,
       );
diff --git a/superset-frontend/src/explore/components/controls/DatasourceControl/index.jsx b/superset-frontend/src/explore/components/controls/DatasourceControl/index.jsx
index c78683b9980d..c0dc8bb01000 100644
--- a/superset-frontend/src/explore/components/controls/DatasourceControl/index.jsx
+++ b/superset-frontend/src/explore/components/controls/DatasourceControl/index.jsx
@@ -20,6 +20,7 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import { t, styled, supersetTheme } from '@superset-ui/core';
+import { getUrlParam } from 'src/utils/urlUtils';
 
 import { Dropdown, Menu } from 'src/common/components';
 import { Tooltip } from 'src/components/Tooltip';
@@ -32,6 +33,7 @@ import { postForm } from 'src/explore/exploreUtils';
 import Button from 'src/components/Button';
 import ErrorAlert from 'src/components/ErrorMessage/ErrorAlert';
 import WarningIconWithTooltip from 'src/components/WarningIconWithTooltip';
+import { URL_PARAMS } from 'src/constants';
 
 const propTypes = {
   actions: PropTypes.object.isRequired,
@@ -182,6 +184,14 @@ class DatasourceControl extends React.PureComponent {
     const { showChangeDatasourceModal, showEditDatasourceModal } = this.state;
     const { datasource, onChange } = this.props;
     const isMissingDatasource = datasource.id == null;
+    let isMissingParams = false;
+    if (isMissingDatasource) {
+      const datasetId = getUrlParam(URL_PARAMS.datasetId);
+      const sliceId = getUrlParam(URL_PARAMS.sliceId);
+      if (!datasetId && !sliceId) {
+        isMissingParams = true;
+      }
+    }
 
     const isSqlSupported = datasource.type === 'table';
 
@@ -244,7 +254,25 @@ class DatasourceControl extends React.PureComponent {
           </Dropdown>
         </div>
         {/* missing dataset */}
-        {isMissingDatasource && (
+        {isMissingDatasource && isMissingParams && (
+          <div className="error-alert">
+            <ErrorAlert
+              level="warning"
+              title={t('Missing URL parameters')}
+              source="explore"
+              subtitle={
+                <>
+                  <p>
+                    {t(
+                      'The URL is missing the dataset_id or slice_id parameters.',
+                    )}
+                  </p>
+                </>
+              }
+            />
+          </div>
+        )}
+        {isMissingDatasource && !isMissingParams && (
           <div className="error-alert">
             <ErrorAlert
               level="warning"
diff --git a/superset/views/core.py b/superset/views/core.py
index fa5cd0cb5f86..6ce873b18518 100755
--- a/superset/views/core.py
+++ b/superset/views/core.py
@@ -747,6 +747,16 @@ def explore(
             if value:
                 initial_form_data = json.loads(value)
 
+        if not initial_form_data:
+            slice_id = request.args.get("slice_id")
+            dataset_id = request.args.get("dataset_id")
+            if slice_id:
+                initial_form_data["slice_id"] = slice_id
+                flash(_("Form data not found in cache, reverting to chart metadata."))
+            elif dataset_id:
+                initial_form_data["datasource"] = f"{dataset_id}__table"
+                flash(_("Form data not found in cache, reverting to dataset metadata."))
+
         form_data, slc = get_form_data(
             use_slice_data=True, initial_form_data=initial_form_data
         )