diff --git a/public/locales/de/translation.json b/public/locales/de/translation.json
index 3017d40..6a8d083 100644
--- a/public/locales/de/translation.json
+++ b/public/locales/de/translation.json
@@ -30,12 +30,9 @@
     "usernamePlaceholder": "Geben Sie Ihren Anzeigename ein",
     "usernamePlaceholderThirdPerson": "Geben Sie den Anzeigename ein",
     "usernameInfo": "Der Anzeigename wird verwendet, um Sie im Dashboard anzuzeigen.",
-    "accountName": "Benutzername",
-    "accountNamePlaceholder": "Geben Sie Ihren Benutzernamen ein",
-    "accountNamePlaceholderThirdPerson": "Geben Sie den Benutzernamen ein",
-    "accountNameInfo": "Der Benutzername wird verwendet, um sich anzumelden.",
     "email": "E-Mail",
     "emailPlaceholder": "Geben Sie Ihre E-Mail ein",
+    "emailPlaceholderThirdPerson": "Geben Sie die E-Mail ein",
     "password": "Passwort",
     "passwordPlaceholder": "Geben Sie Ihr Passwort ein",
     "noDataFound": "Keine Einträge gefunden",
@@ -53,11 +50,10 @@
     "inputRules": {
       "usernameRequired": "Anzeigename ist erforderlich",
       "usernameMinLength": "Anzeigename muss mindestens {{minLength}} Zeichen lang sein",
-      "accountNameRequired": "Benutzername ist erforderlich",
-      "accountNameMinLength": "Benutzername muss mindestens {{minLength}} Zeichen lang sein",
-      "accountNameTaken": "Benutzername ist bereits vergeben",
+      "emailMinLength": "E-Mail muss mindestens {{minLength}} Zeichen lang sein",
       "emailRequired": "E-Mail ist erforderlich",
       "emailInvalid": "E-Mail ist ungültig",
+      "emailTaken": "E-Mail wird bereits verwendet",
       "passwordRequired": "Passwort ist erforderlich",
       "passwordMinLength": "Passwort muss mindestens {{minLength}} Zeichen lang sein",
       "calendarMaxFutureBookingDaysRequired": "Maximaler Buchungszeitraum ist erforderlich",
@@ -170,7 +166,11 @@
     },
     "signUp": {
       "button": "Registrieren",
-      "alreadyHaveAccount": "Sie haben bereits ein Konto?"
+      "alreadyHaveAccount": "Sie haben bereits ein Konto?",
+      "pendingEmailVerification": {
+        "title": "E-Mail-Verifizierung ausstehend",
+        "description": "Bitte überprüfen Sie Ihr E-Mail-Postfach und klicken Sie auf den Link in der E-Mail, um Ihre E-Mail-Adresse zu verifizieren."
+      }
     },
     "request": {
       "400": {
diff --git a/public/locales/en/translation.json b/public/locales/en/translation.json
index 7a5ea59..762bfda 100644
--- a/public/locales/en/translation.json
+++ b/public/locales/en/translation.json
@@ -30,12 +30,9 @@
     "usernamePlaceholder": "Enter your username",
     "usernameInfo": "The display name is used to display you in the dashboard.",
     "usernamePlaceholderThirdPerson": "Enter the username",
-    "accountName": "Account name",
-    "accountNamePlaceholder": "Enter your account name",
-    "accountNamePlaceholderThirdPerson": "Enter the account name",
-    "accountNameInfo": "The account name is used to log in.",
     "email": "Email",
     "emailPlaceholder": "Enter your email",
+    "emailPlaceholderThirdPerson": "Enter the email",
     "password": "Password",
     "passwordPlaceholder": "Enter your password",
     "noDataFound": "No data found",
@@ -53,11 +50,10 @@
     "inputRules": {
       "usernameRequired": "Please enter your username",
       "usernameMinLength": "Username must be at least {{minLength}} characters",
-      "accountNameRequired": "Please enter your account name",
-      "accountNameMinLength": "Account name must be at least {{minLength}} characters",
-      "accountNameTaken": "Account name already exists",
+      "emailMinLength": "Email must be at least {{minLength}} characters",
       "emailRequired": "Please enter your email",
       "emailInvalid": "Please enter a valid email",
+      "emailTaken": "This email is already taken",
       "passwordRequired": "Please enter your password",
       "passwordMinLength": "Password must be at least {{minLength}} characters",
       "calendarMaxFutureBookingDaysRequired": "Please enter the max. future booking days",
@@ -171,6 +167,10 @@
     "signUp": {
       "button": "Sign up",
       "alreadyHaveAccount": "Already have an account?",
+      "pendingEmailVerification": {
+        "title": "Email verification pending",
+        "description": "Please check your email inbox and click on the link in the e-mail to verify your e-mail address."
+      },
       "request": {
         "400": {
           "title": "Sign up failed",
@@ -332,13 +332,7 @@
       "confirmNewPasswordPlaceholder": "Confirm your new password",
       "confirmNewPasswordMismatch": "The new password do not match",
       "button": "Change password",
-      "buttonInfo": "After changing your password, you will be logged out and have to log in again.",
-      "request": {
-        "400": {
-          "title": "Password incorrect",
-          "description": "Please check your password and try again."
-        }
-      }
+      "buttonInfo": "After changing your password, you will be logged out and have to log in again."
     },
     "yourSessions": {
       "cardTitle": "Your sessions",
diff --git a/src/Components/MyFormInputs/index.js b/src/Components/MyFormInputs/index.js
index bbeb4ae..b1a09d4 100644
--- a/src/Components/MyFormInputs/index.js
+++ b/src/Components/MyFormInputs/index.js
@@ -1,5 +1,5 @@
 import { Form, Input, InputNumber, Skeleton } from "antd";
-import { Constants, myFetch } from "../../utils";
+import { Constants, isEmailValid, myFetch } from "../../utils";
 import { useRef } from "react";
 import { useTranslation } from "react-i18next";
 
@@ -36,48 +36,6 @@ export function MyUsernameFormInput({
   );
 }
 
-export function MyAccountNameFormInput({
-  propsFormItem,
-  propsInput,
-  disableAccountNameCheck,
-  hasFeedback,
-  showSkeleton,
-  thirdPerson,
-}) {
-  const { t } = useTranslation();
-
-  return (
-    <MyAvailableCheckFormInput
-      propsFormItem={propsFormItem}
-      propsInput={propsInput}
-      hasFeedback={hasFeedback}
-      showSkeleton={showSkeleton}
-      formItemName="accountName"
-      minLength={Constants.GLOBALS.MIN_ACCOUNT_NAME_LENGTH}
-      maxLength={Constants.GLOBALS.MAX_ACCOUNT_NAME_LENGTH}
-      label={t("common.accountName")}
-      ruleMessageValueRequired={t("common.inputRules.accountNameRequired")}
-      ruleMessageValueMinLengthRequired={t(
-        "common.inputRules.accountNameMinLength",
-        {
-          minLength: Constants.GLOBALS.MIN_ACCOUNT_NAME_LENGTH,
-        }
-      )}
-      ruleMessageValueNotAvailable={t("common.inputRules.accountNameTaken")}
-      inputPlaceholder={
-        thirdPerson
-          ? t("common.accountNamePlaceholderThirdPerson")
-          : t("common.accountNamePlaceholder")
-      }
-      inputType="text"
-      disableAvailableCheck={disableAccountNameCheck}
-      fetchUrl="/user/auth/check/accountname"
-      fetchParameter="accountName"
-      fetchDelay={Constants.DELAY_ACCOUNT_NAME_CHECK}
-    />
-  );
-}
-
 export function MyPasswordFormInput({
   propsFormItem,
   propsInput,
@@ -110,6 +68,52 @@ export function MyPasswordFormInput({
   );
 }
 
+export function MyEmailFormInput({
+  propsFormItem,
+  propsInput,
+  disableEmailCheck,
+  hasFeedback,
+  showSkeleton,
+  thirdPerson,
+}) {
+  const { t } = useTranslation();
+
+  return (
+    <MyAvailableCheckFormInput
+      propsFormItem={propsFormItem}
+      propsInput={propsInput}
+      hasFeedback={hasFeedback}
+      showSkeleton={showSkeleton}
+      formItemName="email"
+      minLength={Constants.GLOBALS.MIN_EMAIL_LENGTH}
+      maxLength={Constants.GLOBALS.MAX_EMAIL_LENGTH}
+      label={t("common.email")}
+      ruleMessageValueRequired={t("common.inputRules.emailRequired")}
+      ruleMessageValueNotAvailable={t("common.inputRules.emailTaken")}
+      inputPlaceholder={
+        thirdPerson
+          ? t("common.emailPlaceholderThirdPerson")
+          : t("common.emailPlaceholder")
+      }
+      ruleMessageValueMinLengthRequired={t("common.inputRules.emailMinLength", {
+        minLength: Constants.GLOBALS.MIN_EMAIL_LENGTH,
+      })}
+      inputType="email"
+      disableAvailableCheck={disableEmailCheck}
+      fetchUrl="/user/auth/check/email"
+      fetchParameter="email"
+      fetchDelay={Constants.DELAY_EMAIL_CHECK}
+      formItemRules={[
+        {
+          type: "email",
+          message: t("common.inputRules.emailInvalid"),
+        },
+      ]}
+    />
+  );
+}
+
+/*
 export function MyEmailFormInput() {
   const { t } = useTranslation();
 
@@ -130,7 +134,7 @@ export function MyEmailFormInput() {
       ]}
     />
   );
-}
+} */
 
 export function MyCalendarMaxFutureBookingDaysFormInput({ formItemName }) {
   const { t } = useTranslation();
@@ -214,6 +218,7 @@ export function MyAvailableCheckFormInput({
   fetchDelay,
   hasFeedback,
   showSkeleton,
+  formItemRules,
 }) {
   const delayTimeout = useRef();
 
@@ -238,9 +243,14 @@ export function MyAvailableCheckFormInput({
       inputType={inputType}
       showSkeleton={showSkeleton}
       formItemRules={[
+        ...formItemRules,
         () => ({
           validator(_, value) {
-            if (!value || !isValid(value)) {
+            if (
+              !value ||
+              !isValid(value) ||
+              (inputType === "email" && isEmailValid(value) === false)
+            ) {
               return Promise.reject("");
             }
 
@@ -256,7 +266,7 @@ export function MyAvailableCheckFormInput({
               delayTimeout.current = setTimeout(() => {
                 let body = {};
 
-                body[fetchParameter] = value; // like accountName: value
+                body[fetchParameter] = value; // like email: value
 
                 myFetch({
                   url: fetchUrl,
diff --git a/src/Pages/Authentication/index.js b/src/Pages/Authentication/index.js
index b30cf93..1849614 100644
--- a/src/Pages/Authentication/index.js
+++ b/src/Pages/Authentication/index.js
@@ -19,8 +19,8 @@ import {
 } from "../../utils";
 import { useEffect, useRef, useState } from "react";
 import {
-  MyAccountNameFormInput,
   MyCompanyNameFormInput,
+  MyEmailFormInput,
   MyPasswordFormInput,
   MyUsernameFormInput,
 } from "../../Components/MyFormInputs";
@@ -115,6 +115,7 @@ const LoginStep = {
   INIT_LOGIN: 4,
   BANNED: 5,
   _BACK_TO_PASSWORD: 6, // needed for going back from pending deletion to password step as the useEffect for the account name is triggered and would set the step to account name
+  PENDING_EMAIL_VERIFICATION: 7,
 };
 
 // First step: account name -> get state of account by backend
@@ -123,13 +124,13 @@ function Login({ notificationApi }) {
   const { t } = useTranslation();
   const navigate = useNavigate();
 
-  const [isRequesting, setIsRequesting] = useState(false);
   const [step, setStep] = useState(LoginStep.ACCOUNT_NAME);
+  const [isRequesting, setIsRequesting] = useState(false);
   const recaptchaValueRef = useRef(null);
 
   const [form] = Form.useForm();
 
-  const accountName = Form.useWatch("accountName", form);
+  const email = Form.useWatch("email", form);
 
   const showErrorNotification = (errStatus) => {
     if (errStatus === 400) {
@@ -141,7 +142,7 @@ function Login({ notificationApi }) {
   };
 
   useEffect(() => {
-    if (!accountName) return;
+    if (!email) return;
 
     // triggered if step was set to pending deletion and the user wants to reactivate the account
     if (step === LoginStep._BACK_TO_PASSWORD) {
@@ -153,7 +154,7 @@ function Login({ notificationApi }) {
     if (step === LoginStep.PASSWORD || step === LoginStep.INIT_LOGIN) {
       setStep(LoginStep.ACCOUNT_NAME);
     }
-  }, [accountName]);
+  }, [email]);
 
   if (step === LoginStep.PENDING_DELETION) {
     return (
@@ -170,10 +171,7 @@ function Login({ notificationApi }) {
           <Button
             key={1}
             type="primary"
-            onClick={() => {
-              console.log("reactivate account");
-              setStep(LoginStep._BACK_TO_PASSWORD);
-            }}
+            onClick={() => setStep(LoginStep._BACK_TO_PASSWORD)}
           >
             {t("authentication.login.stateAccountPendingDeletion.button")}
           </Button>,
@@ -212,6 +210,10 @@ function Login({ notificationApi }) {
     );
   }
 
+  if (step === LoginStep.PENDING_EMAIL_VERIFICATION) {
+    return <PendingEmailVerification />;
+  }
+
   return (
     <Form
       form={form}
@@ -227,10 +229,7 @@ function Login({ notificationApi }) {
         </Typography.Paragraph>
       )}
 
-      <MyAccountNameFormInput
-        disableAccountNameCheck={true}
-        hasFeedback={false}
-      />
+      <MyEmailFormInput hasFeedback={false} disableEmailCheck />
 
       <div
         style={{
@@ -272,10 +271,10 @@ function Login({ notificationApi }) {
           let validateFields = [];
 
           if (step === LoginStep.ACCOUNT_NAME) {
-            validateFields = ["accountName"];
+            validateFields = ["email"];
           } else {
             validateFields = [
-              "accountName",
+              "email",
               "password",
               "rememberMe",
               "recaptcha",
@@ -289,7 +288,7 @@ function Login({ notificationApi }) {
               setIsRequesting(true);
 
               let body = {
-                accountName: values.accountName.toLocaleLowerCase(),
+                email: values.email.toLocaleLowerCase(),
               };
 
               if (
@@ -335,6 +334,9 @@ function Login({ notificationApi }) {
                     case Constants.ACCOUNT_STATE.INIT_LOGGING:
                       setStep(LoginStep.INIT_LOGIN);
                       break;
+                    case Constants.ACCOUNT_STATE.PENDING_EMAIL_VERIFICATION:
+                      setStep(LoginStep.PENDING_EMAIL_VERIFICATION);
+                      break;
                     default:
                       showUnkownErrorNotification(notificationApi, t);
                       break;
@@ -369,10 +371,16 @@ function Login({ notificationApi }) {
   );
 }
 
+const SignUpStep = {
+  SIGN_UP: 1,
+  PENDING_EMAIL_VERIFICATION: 2,
+};
+
 function SignUp({ notificationApi }) {
   const { t, i18n } = useTranslation();
   const navigate = useNavigate();
 
+  const [step, setStep] = useState(SignUpStep.SIGN_UP);
   const [isRequesting, setIsRequesting] = useState(false);
   const recaptchaValueRef = useRef(null);
 
@@ -398,7 +406,7 @@ function SignUp({ notificationApi }) {
           method: "POST",
           body: {
             companyName: values.companyName,
-            accountName: values.accountName.toLocaleLowerCase(),
+            email: values.email.toLocaleLowerCase(),
             password: EncodeStringToBase64(values.password),
             username: values.username,
             language: i18n.language,
@@ -408,21 +416,22 @@ function SignUp({ notificationApi }) {
           notificationApi: notificationApi,
           t: t,
         })
-          .then((data) => {
-            setUserSessionToLocalStorage(data.XAuthorization);
-            window.location.href = "/";
-          })
+          .then(() => setStep(SignUpStep.PENDING_EMAIL_VERIFICATION))
           .catch((errStatus) => {
             showErrorNotification(errStatus);
             setIsRequesting(false);
           });
       })
-      .catch((err) => {
-        console.log(err);
+      .catch(() => {
         showInputsInvalidNotification(notificationApi, t);
+        setIsRequesting(false);
       });
   };
 
+  if (step === SignUpStep.PENDING_EMAIL_VERIFICATION) {
+    return <PendingEmailVerification />;
+  }
+
   return (
     <Form
       form={form}
@@ -438,10 +447,7 @@ function SignUp({ notificationApi }) {
         propsFormItem={{ extra: t("common.usernameInfo") }}
       />
 
-      <MyAccountNameFormInput
-        hasFeedback={true}
-        propsFormItem={{ extra: t("common.accountNameInfo") }}
-      />
+      <MyEmailFormInput hasFeedback={true} />
 
       <MyPasswordFormInput />
 
@@ -489,3 +495,15 @@ function SignUp({ notificationApi }) {
     </Form>
   );
 }
+
+function PendingEmailVerification() {
+  const { t } = useTranslation();
+
+  return (
+    <Result
+      status="warning"
+      title={t("authentication.signUp.pendingEmailVerification.title")}
+      subTitle={t("authentication.signUp.pendingEmailVerification.description")}
+    />
+  );
+}
diff --git a/src/Pages/Store/Employees/index.js b/src/Pages/Store/Employees/index.js
index 9001b9a..9a2c083 100644
--- a/src/Pages/Store/Employees/index.js
+++ b/src/Pages/Store/Employees/index.js
@@ -21,9 +21,9 @@ import {
 import { useTranslation } from "react-i18next";
 import MyTable from "../../../Components/MyTable";
 import {
-  MyAccountNameFormInput,
   MyCalendarMaxFutureBookingDaysFormInput,
   MyCalendarMinEarliestBookingTimeFormInput,
+  MyEmailFormInput,
   MyPasswordFormInput,
   MyUsernameFormInput,
 } from "../../../Components/MyFormInputs";
@@ -56,9 +56,9 @@ export default function StoreEmployees() {
   const getTableColumns = () => {
     return [
       {
-        title: t("common.accountName"),
-        dataIndex: "account_name",
-        key: "account_name",
+        title: t("common.email"),
+        dataIndex: "email",
+        key: "email",
       },
       {
         title: t("common.username"),
@@ -124,7 +124,7 @@ export default function StoreEmployees() {
     return requestData.employees.map((employee) => {
       return {
         key: employee.user_id,
-        account_name: employee.account_name,
+        email: employee.email,
         username: employee.username,
         calendarMaxFutureBookingDays:
           employee.calendar_max_future_booking_days ||
@@ -227,7 +227,7 @@ function ModalAddEditEmployee({
     if (modalOptions.mode === "edit") {
       form.setFieldsValue({
         username: modalOptions.selectedEmployee.username,
-        accountName: modalOptions.selectedEmployee.account_name,
+        email: modalOptions.selectedEmployee.email,
         calendarMaxFutureBookingDays:
           modalOptions.selectedEmployee.calendarMaxFutureBookingDays ||
           storeSettings.calendar_max_future_booking_days,
@@ -283,7 +283,7 @@ function ModalAddEditEmployee({
                     let body = {
                       storeId: storeId,
                       username: values.username,
-                      accountName: values.accountName,
+                      email: values.email,
                       language: i18n.language,
                       passwordSetOnInitLogging:
                         values.checkboxSetPasswordOnLogging,
@@ -343,7 +343,7 @@ function ModalAddEditEmployee({
               onSave={() => {
                 // only validate if something has changed
                 const formUsername = form.getFieldValue("username");
-                const formAccountName = form.getFieldValue("accountName");
+                const formEmail = form.getFieldValue("email");
                 const formCalendarMaxFutureBookingDays = form.getFieldValue(
                   "calendarMaxFutureBookingDays"
                 );
@@ -353,8 +353,7 @@ function ModalAddEditEmployee({
 
                 if (
                   formUsername === modalOptions.selectedEmployee.username &&
-                  formAccountName ===
-                    modalOptions.selectedEmployee.account_name &&
+                  formEmail === modalOptions.selectedEmployee.email &&
                   formCalendarMaxFutureBookingDays ===
                     modalOptions.selectedEmployee.maxFutureBookingDays &&
                   formCalendarMinEarliestBookingTime ===
@@ -374,11 +373,9 @@ function ModalAddEditEmployee({
                   body.username = formUsername;
                 }
 
-                if (
-                  formAccountName !== modalOptions.selectedEmployee.account_name
-                ) {
-                  validateFields.push("accountName");
-                  body.accountName = formAccountName;
+                if (formEmail !== modalOptions.selectedEmployee.email) {
+                  validateFields.push("email");
+                  body.email = formEmail;
                 }
 
                 if (
@@ -441,7 +438,7 @@ function ModalAddEditEmployee({
         >
           <MyUsernameFormInput thirdPerson />
 
-          <MyAccountNameFormInput hasFeedback thirdPerson />
+          <MyEmailFormInput hasFeedback thirdPerson />
 
           {modalOptions.mode === "add" && (
             <>
diff --git a/src/Pages/UserProfile/index.js b/src/Pages/UserProfile/index.js
index 0d98819..fb20263 100644
--- a/src/Pages/UserProfile/index.js
+++ b/src/Pages/UserProfile/index.js
@@ -32,7 +32,6 @@ import {
 } from "../../Components/MyRequestStateItem";
 import { LogoutOutlined } from "@ant-design/icons";
 import {
-  MyAccountNameFormInput,
   MyEmailFormInput,
   MyFormInput,
   MyPasswordFormInput,
@@ -173,7 +172,7 @@ function YourProfile({
   const language = Form.useWatch("language", form);
   const analyticsEnabled = Form.useWatch("analyticsEnabled", form);
   const username = Form.useWatch("username", form);
-  const accountName = Form.useWatch("accountName", form);
+  const email = Form.useWatch("email", form);
 
   const requestState = globalRequestState.yourProfile;
 
@@ -191,7 +190,7 @@ function YourProfile({
           language: data.language,
           analyticsEnabled: data.analytics_enabled,
           username: data.username,
-          accountName: data.account_name,
+          email: data.email,
         });
       })
       .catch(() => {
@@ -207,7 +206,7 @@ function YourProfile({
       language === undefined ||
       analyticsEnabled === undefined ||
       username === undefined ||
-      accountName === undefined
+      email === undefined
     )
       return;
 
@@ -247,8 +246,8 @@ function YourProfile({
             body.username = username;
           }
 
-          if (accountName !== requestData.account_name) {
-            body.accountName = accountName;
+          if (email !== requestData.email) {
+            body.email = email;
           }
 
           if (Object.keys(body).length === 0) {
@@ -278,7 +277,7 @@ function YourProfile({
                 language: language,
                 analytics_enabled: analyticsEnabled,
                 username: username,
-                account_name: accountName,
+                email: email,
               });
 
               sideBarContext.setUsername(username);
@@ -299,7 +298,7 @@ function YourProfile({
           });
         });
     }, 500);
-  }, [language, analyticsEnabled, username, accountName]);
+  }, [language, analyticsEnabled, username, email]);
 
   return (
     <Card title={t("userProfile.yourProfile.cardTitle")}>
@@ -345,10 +344,10 @@ function YourProfile({
           showSkeleton={requestState === RequestState.INIT}
         />
 
-        <MyAccountNameFormInput
+        <MyEmailFormInput
           showSkeleton={requestState === RequestState.INIT}
           hasFeedback
-          disableAccountNameCheck={requestData.account_name === accountName}
+          disableEmailCheck={requestData.email === email}
         />
       </Form>
     </Card>
@@ -408,12 +407,7 @@ function ChangePassword({
             });
 
             if (err === 400) {
-              notificationApi["error"]({
-                message: t("userProfile.changePassword.request.400.title"),
-                description: t(
-                  "userProfile.changePassword.request.400.description"
-                ),
-              });
+              showPasswordIncorrectNotification(notificationApi, t);
             }
           });
       })
diff --git a/src/utils.js b/src/utils.js
index be79aaa..2d101dd 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -60,8 +60,11 @@ export const Constants = {
   GLOBALS: {
     MIN_USERNAME_LENGTH: 3,
     MAX_USERNAME_LENGTH: 20,
-    MIN_ACCOUNT_NAME_LENGTH: 3,
-    MAX_ACCOUNT_NAME_LENGTH: 20,
+    //MIN_ACCOUNT_NAME_LENGTH: 3,
+    //MAX_ACCOUNT_NAME_LENGTH: 20,
+    MIN_EMAIL_LENGTH: 3,
+    MAX_EMAIL_LENGTH: 64,
+    EMAIL_REGEX: /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/,
     MIN_PASSWORD_LENGTH: 8,
     MAX_PASSWORD_LENGTH: 64,
     MIN_STORE_SERVICE_NAME_LENGTH: 3,
@@ -82,7 +85,7 @@ export const Constants = {
     MIN_COMPANY_NAME_LENGTH: 3,
     MAX_COMPANY_NAME_LENGTH: 64,
   },
-  DELAY_ACCOUNT_NAME_CHECK: 250,
+  DELAY_EMAIL_CHECK: 250,
   CLARITY_PROJECT_ID: process.env.REACT_APP_CLARITY_PROJECT_ID,
   ACCOUNT_DELETED_AFTER_DAYS: 30,
   ACCOUNT_STATE: {
@@ -90,10 +93,15 @@ export const Constants = {
     PENDING_DELETION: 1,
     INIT_LOGGING: 2,
     BANNED: 3,
+    PENDING_EMAIL_VERIFICATION: 4,
   },
   SUPPORT_EMAIL: process.env.REACT_APP_SUPPORT_EMAIL,
 };
 
+export function isEmailValid(email) {
+  return Constants.GLOBALS.EMAIL_REGEX.test(email);
+}
+
 export const AppStyle = {
   app: {
     margin: 12,