diff --git a/server/constants/error.ts b/server/constants/error.ts
index ac18c3ec8..96fafdc97 100644
--- a/server/constants/error.ts
+++ b/server/constants/error.ts
@@ -2,6 +2,7 @@ export enum ApiErrorCode {
   InvalidUrl = 'INVALID_URL',
   InvalidCredentials = 'INVALID_CREDENTIALS',
   InvalidAuthToken = 'INVALID_AUTH_TOKEN',
+  InvalidEmail = 'INVALID_EMAIL',
   NotAdmin = 'NOT_ADMIN',
   SyncErrorGroupedFolders = 'SYNC_ERROR_GROUPED_FOLDERS',
   SyncErrorNoLibraries = 'SYNC_ERROR_NO_LIBRARIES',
diff --git a/server/routes/user/usersettings.ts b/server/routes/user/usersettings.ts
index 9669cb186..11cbd666f 100644
--- a/server/routes/user/usersettings.ts
+++ b/server/routes/user/usersettings.ts
@@ -1,3 +1,4 @@
+import { ApiErrorCode } from '@server/constants/error';
 import { getRepository } from '@server/datasource';
 import { User } from '@server/entity/User';
 import { UserSettings } from '@server/entity/UserSettings';
@@ -9,6 +10,7 @@ import { Permission } from '@server/lib/permissions';
 import { getSettings } from '@server/lib/settings';
 import logger from '@server/logger';
 import { isAuthenticated } from '@server/middleware/auth';
+import { ApiError } from '@server/types/error';
 import { Router } from 'express';
 import { canMakePermissionsChange } from '.';
 
@@ -98,10 +100,18 @@ userSettingsRoutes.post<
     }
 
     user.username = req.body.username;
+    const oldEmail = user.email;
     if (user.jellyfinUsername) {
       user.email = req.body.email || user.jellyfinUsername || user.email;
     }
 
+    const existingUser = await userRepository.findOne({
+      where: { email: user.email },
+    });
+    if (oldEmail !== user.email && existingUser) {
+      throw new ApiError(400, ApiErrorCode.InvalidEmail);
+    }
+
     // Update quota values only if the user has the correct permissions
     if (
       !user.hasPermission(Permission.MANAGE_USERS) &&
@@ -145,7 +155,14 @@ userSettingsRoutes.post<
       email: savedUser.email,
     });
   } catch (e) {
-    next({ status: 500, message: e.message });
+    if (e.errorCode) {
+      return next({
+        status: e.statusCode,
+        message: e.errorCode,
+      });
+    } else {
+      return next({ status: 500, message: e.message });
+    }
   }
 });
 
diff --git a/src/components/UserProfile/UserSettings/UserGeneralSettings/index.tsx b/src/components/UserProfile/UserSettings/UserGeneralSettings/index.tsx
index 15d960714..502a9d84f 100644
--- a/src/components/UserProfile/UserSettings/UserGeneralSettings/index.tsx
+++ b/src/components/UserProfile/UserSettings/UserGeneralSettings/index.tsx
@@ -14,6 +14,7 @@ import globalMessages from '@app/i18n/globalMessages';
 import ErrorPage from '@app/pages/_error';
 import defineMessages from '@app/utils/defineMessages';
 import { ArrowDownOnSquareIcon } from '@heroicons/react/24/outline';
+import { ApiErrorCode } from '@server/constants/error';
 import type { UserSettingsGeneralResponse } from '@server/interfaces/api/userSettingsInterfaces';
 import { Field, Form, Formik } from 'formik';
 import { useRouter } from 'next/router';
@@ -42,6 +43,7 @@ const messages = defineMessages(
     user: 'User',
     toastSettingsSuccess: 'Settings saved successfully!',
     toastSettingsFailure: 'Something went wrong while saving settings.',
+    toastSettingsFailureEmail: 'This email is already taken!',
     region: 'Discover Region',
     regionTip: 'Filter content by regional availability',
     originallanguage: 'Discover Language',
@@ -178,7 +180,7 @@ const UserGeneralSettings = () => {
                 watchlistSyncTv: values.watchlistSyncTv,
               }),
             });
-            if (!res.ok) throw new Error();
+            if (!res.ok) throw new Error(res.statusText, { cause: res });
 
             if (currentUser?.id === user?.id && setLocale) {
               setLocale(
@@ -193,10 +195,24 @@ const UserGeneralSettings = () => {
               appearance: 'success',
             });
           } catch (e) {
-            addToast(intl.formatMessage(messages.toastSettingsFailure), {
-              autoDismiss: true,
-              appearance: 'error',
-            });
+            let errorData;
+            try {
+              errorData = await e.cause?.text();
+              errorData = JSON.parse(errorData);
+            } catch {
+              /* empty */
+            }
+            if (errorData?.message === ApiErrorCode.InvalidEmail) {
+              addToast(intl.formatMessage(messages.toastSettingsFailureEmail), {
+                autoDismiss: true,
+                appearance: 'error',
+              });
+            } else {
+              addToast(intl.formatMessage(messages.toastSettingsFailure), {
+                autoDismiss: true,
+                appearance: 'error',
+              });
+            }
           } finally {
             revalidate();
             revalidateUser();