diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index fd578af93..d010b4ab0 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -70,11 +70,13 @@ const email = {
   EMAIL: process.env.EMAIL === 'true' || false,
   EMAIL_TEST_MODUS: process.env.EMAIL_TEST_MODUS === 'true' || false,
   EMAIL_TEST_RECEIVER: process.env.EMAIL_TEST_RECEIVER || 'stage1@gradido.net',
-  EMAIL_USERNAME: process.env.EMAIL_USERNAME || 'gradido_email',
+  EMAIL_USERNAME: process.env.EMAIL_USERNAME || '',
   EMAIL_SENDER: process.env.EMAIL_SENDER || 'info@gradido.net',
-  EMAIL_PASSWORD: process.env.EMAIL_PASSWORD || 'xxx',
-  EMAIL_SMTP_URL: process.env.EMAIL_SMTP_URL || 'gmail.com',
-  EMAIL_SMTP_PORT: process.env.EMAIL_SMTP_PORT || '587',
+  EMAIL_PASSWORD: process.env.EMAIL_PASSWORD || '',
+  EMAIL_SMTP_URL: process.env.EMAIL_SMTP_URL || 'mailserver',
+  EMAIL_SMTP_PORT: process.env.EMAIL_SMTP_PORT || '1025',
+  // eslint-disable-next-line no-unneeded-ternary
+  EMAIL_TLS: process.env.EMAIL_TLS === 'false' ? false : true,
   EMAIL_LINK_VERIFICATION:
     process.env.EMAIL_LINK_VERIFICATION || 'http://localhost/checkEmail/{optin}{code}',
   EMAIL_LINK_SETPASSWORD:
diff --git a/backend/src/emails/sendEmailTranslated.ts b/backend/src/emails/sendEmailTranslated.ts
index 69008c00e..5652b3424 100644
--- a/backend/src/emails/sendEmailTranslated.ts
+++ b/backend/src/emails/sendEmailTranslated.ts
@@ -41,7 +41,7 @@ export const sendEmailTranslated = async (params: {
     host: CONFIG.EMAIL_SMTP_URL,
     port: Number(CONFIG.EMAIL_SMTP_PORT),
     secure: false, // true for 465, false for other ports
-    requireTLS: true,
+    requireTLS: CONFIG.EMAIL_TLS,
     auth: {
       user: CONFIG.EMAIL_USERNAME,
       pass: CONFIG.EMAIL_PASSWORD,
diff --git a/docker-compose.override.yml b/docker-compose.override.yml
index fe2f68a8d..c69c68b50 100644
--- a/docker-compose.override.yml
+++ b/docker-compose.override.yml
@@ -112,6 +112,17 @@ services:
     volumes:
      - /sessions
 
+  ########################################################
+  # MAILSERVER TO FAKE SMTP ##############################
+  ########################################################
+  mailserver:
+    image: maildev/maildev
+    ports:
+      - 1080:1080
+      - 1025:1025
+    networks:
+      - external-net
+
 volumes:
   frontend_node_modules:
   admin_node_modules:
diff --git a/docker-compose.test.yml b/docker-compose.test.yml
index 790bd468d..84647ef03 100644
--- a/docker-compose.test.yml
+++ b/docker-compose.test.yml
@@ -81,6 +81,17 @@ services:
   nginx:
     image: gradido/nginx:test
 
+  ########################################################
+  # MAILSERVER TO FAKE SMTP ##############################
+  ########################################################
+  mailserver:
+    image: maildev/maildev
+    ports:
+      - 1080:1080
+      - 1025:1025
+    networks:
+      - external-net
+
 networks:
   external-net:
   internal-net: