diff --git a/Dockerfile b/Dockerfile
index 4c47e737f6b1d580e2827c7981cff9cdbbf0d9c4..59882c3c7c162e17f374f52bd4b493350b5854b8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:12.13-slim
+FROM node:14-slim
 
 # Create app directory
 WORKDIR /app
diff --git a/docker-compose.yml b/docker-compose.yml
index 761adf705b27f7a13c272d9ce356cf53a47de542..3ce9f628d58648fd63d6ec8a59e00517bc660f51 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,7 +1,6 @@
-version: "3.1"
+version: '3.1'
 
 services:
-
   mail-service:
     build: .
     image: registry.forge.grandlyon.com/web-et-numerique/web-et-numerique-internet/data.grandlyon.com/web-portal/components/services/mailer:${TAG}
@@ -10,6 +9,8 @@ services:
     environment:
       - SMTP_HOST=${SMTP_HOST}
       - SMTP_PORT=${SMTP_PORT}
+      - SMTP_USER=${SMTP_USER}
+      - SMTP_PASSWORD=${SMTP_PASSWORD}
       - MAIL_SUBJECT_PREFIX=${MAIL_SUBJECT_PREFIX}
       - USER_SUPPORT_MAILBOX=${USER_SUPPORT_MAILBOX}
       - NO_REPLY_MAIL_ADDRESS=${NO_REPLY_MAIL_ADDRESS}
@@ -17,4 +18,4 @@ services:
       - GROUP_HEADER=x-consumer-groups
       - EMAIL_WRITER_GROUP_NAME=email-writer
       - IMAGE_HOST=https://minio.alpha.grandlyon.com/email-template-assets
-    restart: unless-stopped
\ No newline at end of file
+    restart: unless-stopped
diff --git a/src/configuration/config.service.ts b/src/configuration/config.service.ts
index 6fa1dfd05f1e37050b025b0e1cfde2b0a0c6c60f..d32d55355875b4d957672e068c21ff10223a3c41 100644
--- a/src/configuration/config.service.ts
+++ b/src/configuration/config.service.ts
@@ -9,16 +9,30 @@ export class ConfigService {
     // Initializing conf with values from var env
     this._config.smtpConfig.host = process.env.SMTP_HOST;
     this._config.smtpConfig.port = process.env.SMTP_PORT;
+
+    if (process.env.SMTP_USER && process.env.SMTP_PASSWORD) {
+      this._config.smtpConfig.auth.user = process.env.SMTP_USER;
+      this._config.smtpConfig.auth.pass = process.env.SMTP_PASSWORD;
+    }
     this._config.mailSubjectPrefix = process.env.MAIL_SUBJECT_PREFIX;
     this._config.userSupportMailbox = process.env.USER_SUPPORT_MAILBOX;
     this._config.noReplyMailAddress = process.env.NO_REPLY_MAIL_ADDRESS;
-    this._config.additionalFeedbackEmails = process.env.ADDITIONAL_FEEDBACK_EMAILS;
+    this._config.additionalFeedbackEmails =
+      process.env.ADDITIONAL_FEEDBACK_EMAILS;
     this._config.groupHeader = process.env.GROUP_HEADER;
     this._config.groupNames.emailWriter = process.env.EMAIL_WRITER_GROUP_NAME;
     this._config.imageHost = process.env.IMAGE_HOST;
   }
 
   get config() {
+    const filteredConf = { ...this._config };
+
+    if (
+      !this._config.smtpConfig.auth.user &&
+      !this._config.smtpConfig.auth.pass
+    ) {
+      delete this._config.smtpConfig.auth;
+    }
     return this._config;
   }
-}
\ No newline at end of file
+}
diff --git a/src/configuration/config.ts b/src/configuration/config.ts
index 69f00c4021937eb347338a8f3e537ea7bbb87ad9..661a9234b6f2250d7d9ad7664e79898ea68af2a5 100644
--- a/src/configuration/config.ts
+++ b/src/configuration/config.ts
@@ -7,10 +7,10 @@ export const config = {
       // do not fail on invalid certs
       rejectUnauthorized: false,
     },
-    // auth: {
-    //   user: process.env.SMTP_USER,
-    //   pass: process.env.SMTP_PASS
-    // }
+    auth: {
+      user: null,
+      pass: null,
+    },
   },
   userSupportMailbox: '',
   imageHost: '',
@@ -21,4 +21,4 @@ export const config = {
   mailSubjectPrefix: '',
   noReplyMailAddress: '',
   additionalFeedbackEmails: '',
-};
\ No newline at end of file
+};
diff --git a/template.env b/template.env
index 64c25e5ff5f6b4c9ca9c0615327b3549a64b66ce..91493760f3a7168609cd22750ec32d65dd02bd5b 100644
--- a/template.env
+++ b/template.env
@@ -2,6 +2,8 @@ TAG=<version of the service to deploy>
 
 SMTP_HOST=<host of the SMTP server>
 SMTP_PORT=<port of the SMTP server>
+SMTP_USER=<username of the SMTP server>
+SMTP_PASSWORD=<password for the user of the SMTP server>
 
 MAIL_SERVICE_BIND_PORT=<listening port of the service>
 MAIL_SUBJECT_PREFIX=<prefix used in email subject>