diff --git a/backend/src/graphql/resolvers/emails.ts b/backend/src/graphql/resolvers/emails.ts
index 0491c86ad..f5c4eb0ad 100644
--- a/backend/src/graphql/resolvers/emails.ts
+++ b/backend/src/graphql/resolvers/emails.ts
@@ -15,6 +15,7 @@ import Resolver from './helpers/Resolver'
 export default {
   Query: {
     VerifyNonce: async (_parent, args, context, _resolveInfo) => {
+      args.email = normalizeEmail(args.email)
       const session = context.driver.session()
       const readTxResultPromise = session.readTransaction(async (txc) => {
         const result = await txc.run(
@@ -38,7 +39,6 @@ export default {
     AddEmailAddress: async (_parent, args, context, _resolveInfo) => {
       let response
       args.email = normalizeEmail(args.email)
-
       try {
         const { neode } = context
         await new Validator(neode, neode.model('UnverifiedEmailAddress'), args)
@@ -86,6 +86,7 @@ export default {
       const {
         user: { id: userId },
       } = context
+      args.email = normalizeEmail(args.email)
       const { nonce, email } = args
       const session = context.driver.session()
       const writeTxResultPromise = session.writeTransaction(async (txc) => {
diff --git a/backend/src/graphql/resolvers/helpers/existingEmailAddress.ts b/backend/src/graphql/resolvers/helpers/existingEmailAddress.ts
index e1e27bda0..03d902881 100644
--- a/backend/src/graphql/resolvers/helpers/existingEmailAddress.ts
+++ b/backend/src/graphql/resolvers/helpers/existingEmailAddress.ts
@@ -2,7 +2,10 @@
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
 /* eslint-disable @typescript-eslint/no-unsafe-return */
+import normalizeEmail from './normalizeEmail'
+
 export default async function alreadyExistingMail({ args, context }) {
+  args.email = normalizeEmail(args.email)
   const session = context.driver.session()
   try {
     const existingEmailAddressTxPromise = session.writeTransaction(async (transaction) => {
diff --git a/backend/src/graphql/resolvers/passwordReset.ts b/backend/src/graphql/resolvers/passwordReset.ts
index f806f7249..ac437a555 100644
--- a/backend/src/graphql/resolvers/passwordReset.ts
+++ b/backend/src/graphql/resolvers/passwordReset.ts
@@ -10,15 +10,18 @@ import { v4 as uuid } from 'uuid'
 import registrationConstants from '@constants/registrationBranded'
 
 import createPasswordReset from './helpers/createPasswordReset'
+import normalizeEmail from './helpers/normalizeEmail'
 
 export default {
   Mutation: {
     requestPasswordReset: async (_parent, { email }, { driver }) => {
+      email = normalizeEmail(email)
       // TODO: why this is generated differntly from 'backend/src/schema/resolvers/helpers/generateNonce.js'?
       const nonce = uuid().substring(0, registrationConstants.NONCE_LENGTH)
       return createPasswordReset({ driver, nonce, email })
     },
     resetPassword: async (_parent, { email, nonce, newPassword }, { driver }) => {
+      email = normalizeEmail(email)
       const stillValid = new Date()
       stillValid.setDate(stillValid.getDate() - 1)
       const encryptedNewPassword = await bcrypt.hash(newPassword, 10)
diff --git a/backend/src/graphql/resolvers/users.ts b/backend/src/graphql/resolvers/users.ts
index ac1964beb..a2f4b9dcd 100644
--- a/backend/src/graphql/resolvers/users.ts
+++ b/backend/src/graphql/resolvers/users.ts
@@ -13,6 +13,7 @@ import { getNeode } from '@db/neo4j'
 import { Context } from '@src/server'
 
 import { defaultTrophyBadge, defaultVerificationBadge } from './badges'
+import normalizeEmail from './helpers/normalizeEmail'
 import Resolver from './helpers/Resolver'
 import { mergeImage, deleteImage } from './images/images'
 import { createOrUpdateLocations } from './users/location'
@@ -66,8 +67,8 @@ export default {
       }
     },
     User: async (object, args, context, resolveInfo) => {
-      const { email } = args
-      if (email) {
+      if (args.email) {
+        args.email = normalizeEmail(args.email)
         let session
         try {
           session = context.driver.session()
diff --git a/webapp/components/PasswordReset/Request.spec.js b/webapp/components/PasswordReset/Request.spec.js
index e2f082242..bd7dc419c 100644
--- a/webapp/components/PasswordReset/Request.spec.js
+++ b/webapp/components/PasswordReset/Request.spec.js
@@ -89,24 +89,6 @@ describe('Request', () => {
       })
     })
 
-    describe('capital letters in a gmail address', () => {
-      beforeEach(async () => {
-        wrapper = Wrapper()
-        wrapper.find('input#email').setValue('mAiL@gmail.com')
-        await wrapper.find('form').trigger('submit')
-      })
-
-      it('normalizes email to lower case letters', () => {
-        const expected = expect.objectContaining({
-          variables: {
-            email: 'mail@gmail.com',
-            locale: 'en',
-          },
-        })
-        expect(mocks.$apollo.mutate).toHaveBeenCalledWith(expected)
-      })
-    })
-
     describe('backend throws an error', () => {
       beforeEach(() => {
         mocks.$apollo.mutate = jest.fn().mockRejectedValue({
diff --git a/webapp/components/PasswordReset/Request.vue b/webapp/components/PasswordReset/Request.vue
index 3eebeba65..79558a911 100644
--- a/webapp/components/PasswordReset/Request.vue
+++ b/webapp/components/PasswordReset/Request.vue
@@ -45,7 +45,6 @@
 <script>
 import gql from 'graphql-tag'
 import { SweetalertIcon } from 'vue-sweetalert-icons'
-import normalizeEmail from '~/components/utils/NormalizeEmail'
 
 export default {
   components: {
@@ -68,11 +67,8 @@ export default {
     }
   },
   computed: {
-    email() {
-      return normalizeEmail(this.formData.email)
-    },
     submitMessage() {
-      const { email } = this
+      const email = this.formData.email
       return this.$t('components.password-reset.request.form.submitted', { email })
     },
   },
@@ -90,7 +86,7 @@ export default {
         }
       `
       try {
-        const { email } = this
+        const email = this.formData.email
         await this.$apollo.mutate({ mutation, variables: { email, locale: this.$i18n.locale() } })
         this.submitted = true
 
diff --git a/webapp/components/Registration/RegistrationSlideEmail.vue b/webapp/components/Registration/RegistrationSlideEmail.vue
index 0a74858be..f44811e01 100644
--- a/webapp/components/Registration/RegistrationSlideEmail.vue
+++ b/webapp/components/Registration/RegistrationSlideEmail.vue
@@ -32,7 +32,6 @@
 import gql from 'graphql-tag'
 import metadata from '~/constants/metadata'
 import { isEmail } from 'validator'
-import normalizeEmail from '~/components/utils/NormalizeEmail'
 import translateErrorMessage from '~/components/utils/TranslateErrorMessage'
 
 export const SignupMutation = gql`
@@ -94,9 +93,6 @@ export default {
   },
   methods: {
     async sendValidation() {
-      if (this.formData.email && isEmail(this.formData.email)) {
-        this.formData.email = normalizeEmail(this.formData.email)
-      }
       const { email } = this.formData
 
       this.sliderData.setSliderValuesCallback(this.validInput, { collectedInputData: { email } })
diff --git a/webapp/components/utils/NormalizeEmail.js b/webapp/components/utils/NormalizeEmail.js
deleted file mode 100644
index 45f8126e3..000000000
--- a/webapp/components/utils/NormalizeEmail.js
+++ /dev/null
@@ -1,11 +0,0 @@
-import { normalizeEmail } from 'validator'
-
-export default (email) =>
-  normalizeEmail(email, {
-    // gmail_remove_dots: false, default
-    gmail_remove_subaddress: false,
-    // gmail_convert_googlemaildotcom: true, default
-    outlookdotcom_remove_subaddress: false,
-    yahoo_remove_subaddress: false,
-    icloud_remove_subaddress: false,
-  })
diff --git a/webapp/pages/admin/users/index.spec.js b/webapp/pages/admin/users/index.spec.js
index 85e8789b8..39855b731 100644
--- a/webapp/pages/admin/users/index.spec.js
+++ b/webapp/pages/admin/users/index.spec.js
@@ -114,12 +114,6 @@ describe('Users', () => {
         expect(wrapper.vm.email).toEqual('email@example.org')
         expect(wrapper.vm.filter).toBe(null)
       })
-
-      it('email address is case-insensitive', async () => {
-        const wrapper = await searchAction(Wrapper(), { query: 'eMaiL@example.org' })
-        expect(wrapper.vm.email).toEqual('email@example.org')
-        expect(wrapper.vm.filter).toBe(null)
-      })
     })
 
     describe('query is just text', () => {
diff --git a/webapp/pages/admin/users/index.vue b/webapp/pages/admin/users/index.vue
index 0bd592bad..e431d02bc 100644
--- a/webapp/pages/admin/users/index.vue
+++ b/webapp/pages/admin/users/index.vue
@@ -85,7 +85,6 @@
 <script>
 import { mapGetters } from 'vuex'
 import { isEmail } from 'validator'
-import normalizeEmail from '~/components/utils/NormalizeEmail'
 import PaginationButtons from '~/components/_new/generic/PaginationButtons/PaginationButtons'
 import { adminUserQuery } from '~/graphql/User'
 import { FetchAllRoles, updateUserRole } from '~/graphql/admin/Roles'
@@ -193,7 +192,7 @@ export default {
       this.offset = 0
       const { query } = formData
       if (isEmail(query)) {
-        this.email = normalizeEmail(query)
+        this.email = query
         this.filter = null
       } else {
         this.email = null
diff --git a/webapp/pages/settings/my-email-address/index.vue b/webapp/pages/settings/my-email-address/index.vue
index e46746e62..1db268008 100644
--- a/webapp/pages/settings/my-email-address/index.vue
+++ b/webapp/pages/settings/my-email-address/index.vue
@@ -30,7 +30,6 @@
 import { mapGetters } from 'vuex'
 import { AddEmailAddressMutation } from '~/graphql/EmailAddress.js'
 import { SweetalertIcon } from 'vue-sweetalert-icons'
-import normalizeEmail from '~/components/utils/NormalizeEmail'
 import scrollToContent from '../scroll-to-content.js'
 
 export default {
@@ -62,7 +61,7 @@ export default {
       },
     },
     formSchema() {
-      const currentEmail = normalizeEmail(this.currentUser.email)
+      const currentEmail = this.currentUser.email
       const sameEmailValidationError = this.$t('settings.email.validation.same-email')
       return {
         email: [
@@ -70,7 +69,7 @@ export default {
           {
             validator(rule, value, callback, source, options) {
               const errors = []
-              if (currentEmail === normalizeEmail(value)) {
+              if (currentEmail === value) {
                 errors.push(sameEmailValidationError)
               }
               return errors