diff --git a/backend/src/mailer/sendEMail.test.ts b/backend/src/mailer/sendEMail.test.ts
deleted file mode 100644
index e062b71d8..000000000
--- a/backend/src/mailer/sendEMail.test.ts
+++ /dev/null
@@ -1,113 +0,0 @@
-import { sendEMail } from './sendEMail'
-import { createTransport } from 'nodemailer'
-import CONFIG from '@/config'
-
-import { logger } from '@test/testSetup'
-
-CONFIG.EMAIL = false
-CONFIG.EMAIL_SMTP_URL = 'EMAIL_SMTP_URL'
-CONFIG.EMAIL_SMTP_PORT = '1234'
-CONFIG.EMAIL_USERNAME = 'user'
-CONFIG.EMAIL_PASSWORD = 'pwd'
-
-jest.mock('nodemailer', () => {
-  return {
-    __esModule: true,
-    createTransport: jest.fn(() => {
-      return {
-        sendMail: jest.fn(() => {
-          return {
-            messageId: 'message',
-          }
-        }),
-      }
-    }),
-  }
-})
-
-describe('sendEMail', () => {
-  let result: boolean
-  describe('config email is false', () => {
-    beforeEach(async () => {
-      jest.clearAllMocks()
-      result = await sendEMail({
-        to: 'receiver@mail.org',
-        cc: 'support@gradido.net',
-        subject: 'Subject',
-        text: 'Text text text',
-      })
-    })
-
-    it('logs warning', () => {
-      expect(logger.info).toBeCalledWith('Emails are disabled via config...')
-    })
-
-    it('returns false', () => {
-      expect(result).toBeFalsy()
-    })
-  })
-
-  describe('config email is true', () => {
-    beforeEach(async () => {
-      jest.clearAllMocks()
-      CONFIG.EMAIL = true
-      result = await sendEMail({
-        to: 'receiver@mail.org',
-        cc: 'support@gradido.net',
-        subject: 'Subject',
-        text: 'Text text text',
-      })
-    })
-
-    it('calls the transporter', () => {
-      expect(createTransport).toBeCalledWith({
-        host: 'EMAIL_SMTP_URL',
-        port: 1234,
-        secure: false,
-        requireTLS: true,
-        auth: {
-          user: 'user',
-          pass: 'pwd',
-        },
-      })
-    })
-
-    it('calls sendMail of transporter', () => {
-      expect((createTransport as jest.Mock).mock.results[0].value.sendMail).toBeCalledWith({
-        from: `Gradido (nicht antworten) <${CONFIG.EMAIL_SENDER}>`,
-        to: 'receiver@mail.org',
-        cc: 'support@gradido.net',
-        subject: 'Subject',
-        text: 'Text text text',
-      })
-    })
-
-    it('returns true', () => {
-      expect(result).toBeTruthy()
-    })
-  })
-
-  describe('with email EMAIL_TEST_MODUS true', () => {
-    beforeEach(async () => {
-      jest.clearAllMocks()
-      CONFIG.EMAIL = true
-      CONFIG.EMAIL_TEST_MODUS = true
-      result = await sendEMail({
-        to: 'receiver@mail.org',
-        cc: 'support@gradido.net',
-        subject: 'Subject',
-        text: 'Text text text',
-      })
-    })
-
-    it('calls sendMail of transporter with faked to', () => {
-      expect((createTransport as jest.Mock).mock.results[0].value.sendMail).toBeCalledWith({
-        from: `Gradido (nicht antworten) <${CONFIG.EMAIL_SENDER}>`,
-        to: CONFIG.EMAIL_TEST_RECEIVER,
-        cc: 'support@gradido.net',
-        subject: 'Subject',
-        text: 'Text text text',
-      })
-    })
-  })
-})
diff --git a/backend/src/mailer/sendEMail.ts b/backend/src/mailer/sendEMail.ts
deleted file mode 100644
index 00282f232..000000000
--- a/backend/src/mailer/sendEMail.ts
+++ /dev/null
@@ -1,48 +0,0 @@
-import { backendLogger as logger } from '@/server/logger'
-import { createTransport } from 'nodemailer'
-
-import CONFIG from '@/config'
-
-export const sendEMail = async (emailDef: {
-  to: string
-  cc?: string
-  subject: string
-  text: string
-}): Promise<boolean> => {
-  logger.info(
-    `send Email: to=${emailDef.to}` +
-      (emailDef.cc ? `, cc=${emailDef.cc}` : '') +
-      `, subject=${emailDef.subject}, text=${emailDef.text}`,
-  )
-
-  if (!CONFIG.EMAIL) {
-    logger.info(`Emails are disabled via config...`)
-    return false
-  }
-  if (CONFIG.EMAIL_TEST_MODUS) {
-    logger.info(
-      `Testmodus=ON: change receiver from ${emailDef.to} to ${CONFIG.EMAIL_TEST_RECEIVER}`,
-    )
-    emailDef.to = CONFIG.EMAIL_TEST_RECEIVER
-  }
-  const transporter = createTransport({
-    host: CONFIG.EMAIL_SMTP_URL,
-    port: Number(CONFIG.EMAIL_SMTP_PORT),
-    secure: false, // true for 465, false for other ports
-    requireTLS: true,
-    auth: {
-      user: CONFIG.EMAIL_USERNAME,
-      pass: CONFIG.EMAIL_PASSWORD,
-    },
-  })
-  const info = await transporter.sendMail({
-    ...emailDef,
-    from: `Gradido (nicht antworten) <${CONFIG.EMAIL_SENDER}>`,
-  })
-  if (!info.messageId) {
-    logger.error('error sending notification email, but transaction succeed')
-    throw new Error('error sending notification email, but transaction succeed')
-  }
-  logger.info('send Email successfully.')
-  return true
-}