diff --git a/backend/src/emails/sendEmailTranslated.ts b/backend/src/emails/sendEmailTranslated.ts
index 61554c025..da8b0c67b 100644
--- a/backend/src/emails/sendEmailTranslated.ts
+++ b/backend/src/emails/sendEmailTranslated.ts
@@ -7,7 +7,7 @@ import { createTransport } from 'nodemailer'
 import CONFIG from '@/config'
 import { backendLogger as logger } from '@/server/logger'
 
-export const sendEmailTranslated = ({
+export const sendEmailTranslated = async ({
   receiver,
   template,
   locals,
@@ -18,7 +18,7 @@ export const sendEmailTranslated = ({
   }
   template: string
   locals: Record<string, unknown>
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   // TODO: test the calling order of 'i18n.setLocale' for example: language of logging 'en', language of email receiver 'es', reset language of current user 'de'
 
   if (!CONFIG.EMAIL) {
@@ -65,7 +65,7 @@ export const sendEmailTranslated = ({
     // i18n, // is only needed if you don't install i18n
   })
 
-  void email
+  const resultSend = await email
     .send({
       template: path.join(__dirname, 'templates', template),
       message: receiver,
@@ -76,5 +76,5 @@ export const sendEmailTranslated = ({
       return false
     })
 
-  return true
+  return resultSend
 }
diff --git a/backend/src/emails/sendEmailVariants.test.ts b/backend/src/emails/sendEmailVariants.test.ts
index fe8ed8c3a..e1f3e7cca 100644
--- a/backend/src/emails/sendEmailVariants.test.ts
+++ b/backend/src/emails/sendEmailVariants.test.ts
@@ -83,7 +83,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -159,7 +159,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -235,7 +235,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -323,7 +323,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -401,7 +401,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -479,7 +479,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -555,7 +555,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -639,7 +639,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
@@ -718,7 +718,7 @@ describe('sendEmailVariants', () => {
         })
       })
 
-      it.skip('has expected result', () => {
+      it('has expected result', () => {
         expect(result).toMatchObject({
           envelope: {
             from: 'info@gradido.net',
diff --git a/backend/src/emails/sendEmailVariants.ts b/backend/src/emails/sendEmailVariants.ts
index faf1ba2e0..19aa9faf5 100644
--- a/backend/src/emails/sendEmailVariants.ts
+++ b/backend/src/emails/sendEmailVariants.ts
@@ -13,7 +13,7 @@ export const sendAddedContributionMessageEmail = (data: {
   senderFirstName: string
   senderLastName: string
   contributionMemo: string
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: {
       to: `${data.firstName} ${data.lastName} <${data.email}>`,
@@ -40,7 +40,7 @@ export const sendAccountActivationEmail = (data: {
   language: string
   activationLink: string
   timeDurationObject: Record<string, unknown>
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'accountActivation',
@@ -62,7 +62,7 @@ export const sendAccountMultiRegistrationEmail = (data: {
   lastName: string
   email: string
   language: string
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'accountMultiRegistration',
@@ -86,7 +86,7 @@ export const sendContributionConfirmedEmail = (data: {
   senderLastName: string
   contributionMemo: string
   contributionAmount: Decimal
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'contributionConfirmed',
@@ -113,7 +113,7 @@ export const sendContributionDeletedEmail = (data: {
   senderFirstName: string
   senderLastName: string
   contributionMemo: string
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'contributionDeleted',
@@ -139,7 +139,7 @@ export const sendContributionDeniedEmail = (data: {
   senderFirstName: string
   senderLastName: string
   contributionMemo: string
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'contributionDenied',
@@ -164,7 +164,7 @@ export const sendResetPasswordEmail = (data: {
   language: string
   resetLink: string
   timeDurationObject: Record<string, unknown>
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'resetPassword',
@@ -191,7 +191,7 @@ export const sendTransactionLinkRedeemedEmail = (data: {
   senderEmail: string
   transactionMemo: string
   transactionAmount: Decimal
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'transactionLinkRedeemed',
@@ -220,7 +220,7 @@ export const sendTransactionReceivedEmail = (data: {
   senderLastName: string
   senderEmail: string
   transactionAmount: Decimal
-}): boolean | null => {
+}): Promise<Record<string, unknown> | boolean | null> => {
   return sendEmailTranslated({
     receiver: { to: `${data.firstName} ${data.lastName} <${data.email}>` },
     template: 'transactionReceived',