diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3c486cb20..4cc28bf20 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -527,7 +527,7 @@ jobs:
           report_name: Coverage Backend
           type: lcov
           result_path: ./backend/coverage/lcov.info
-          min_coverage: 76
+          min_coverage: 78
           token: ${{ github.token }}
 
   ##########################################################################
diff --git a/admin/yarn.lock b/admin/yarn.lock
index 7507f2559..5d8275b1a 100644
--- a/admin/yarn.lock
+++ b/admin/yarn.lock
@@ -4141,9 +4141,9 @@ caniuse-api@^3.0.0:
     lodash.uniq "^4.5.0"
 
 caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000844, caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001271:
-  version "1.0.30001354"
-  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001354.tgz"
-  integrity sha512-mImKeCkyGDAHNywYFA4bqnLAzTUvVkqPvhY4DV47X+Gl2c5Z8c3KNETnXp14GQt11LvxE8AwjzGxJ+rsikiOzg==
+  version "1.0.30001442"
+  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001442.tgz"
+  integrity sha512-239m03Pqy0hwxYPYR5JwOIxRJfLTWtle9FV8zosfV5pHg+/51uD4nxcUlM8+mWWGfwKtt8lJNHnD3cWw9VZ6ow==
 
 capture-exit@^2.0.0:
   version "2.0.0"
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/backend/yarn.lock b/backend/yarn.lock
index 82bcd6b1f..264cbd409 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -1913,9 +1913,9 @@ camelcase@^6.2.0:
   integrity sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==
 
 caniuse-lite@^1.0.30001264:
-  version "1.0.30001418"
-  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001418.tgz"
-  integrity sha512-oIs7+JL3K9JRQ3jPZjlH6qyYDp+nBTCais7hjh0s+fuBwufc7uZ7hPYMXrDOJhV360KGMTcczMRObk0/iMqZRg==
+  version "1.0.30001442"
+  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001442.tgz"
+  integrity sha512-239m03Pqy0hwxYPYR5JwOIxRJfLTWtle9FV8zosfV5pHg+/51uD4nxcUlM8+mWWGfwKtt8lJNHnD3cWw9VZ6ow==
 
 chacha20-universal@^1.0.4:
   version "1.0.4"
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:
diff --git a/frontend/yarn.lock b/frontend/yarn.lock
index ff3a7ff1a..f374ac7bd 100644
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -4578,9 +4578,9 @@ caniuse-api@^3.0.0:
     lodash.uniq "^4.5.0"
 
 caniuse-lite@^1.0.0, caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001181, caniuse-lite@^1.0.30001280, caniuse-lite@^1.0.30001286:
-  version "1.0.30001439"
-  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001439.tgz"
-  integrity sha512-1MgUzEkoMO6gKfXflStpYgZDlFM7M/ck/bgfVCACO5vnAf0fXoNVHdWtqGU+MYca+4bL9Z5bpOVmR33cWW9G2A==
+  version "1.0.30001442"
+  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001442.tgz"
+  integrity sha512-239m03Pqy0hwxYPYR5JwOIxRJfLTWtle9FV8zosfV5pHg+/51uD4nxcUlM8+mWWGfwKtt8lJNHnD3cWw9VZ6ow==
 
 capture-exit@^2.0.0:
   version "2.0.0"