diff --git a/backend/.env.template b/backend/.env.template
index c1742ef93..d7a0945ec 100644
--- a/backend/.env.template
+++ b/backend/.env.template
@@ -10,6 +10,9 @@ SMTP_PORT=
 SMTP_IGNORE_TLS=true
 SMTP_USERNAME=
 SMTP_PASSWORD=
+SMTP_DKIM_DOMAINNAME=
+SMTP_DKIM_KEYSELECTOR=
+SMTP_DKIM_PRIVATKEY=
 
 JWT_SECRET="b/&&7b78BF&fv/Vd"
 JWT_EXPIRES="2y"
diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index b6098df11..1544e55a6 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -47,6 +47,9 @@ const smtp = {
   SMTP_SECURE: env.SMTP_SECURE === 'true',
   SMTP_USERNAME: env.SMTP_USERNAME,
   SMTP_PASSWORD: env.SMTP_PASSWORD,
+  SMTP_DKIM_DOMAINNAME: env.SMTP_DKIM_DOMAINNAME,
+  SMTP_DKIM_KEYSELECTOR: env.SMTP_DKIM_KEYSELECTOR,
+  SMTP_DKIM_PRIVATKEY: env.SMTP_DKIM_PRIVATKEY,
 }
 
 const neo4j = {
diff --git a/backend/src/middleware/helpers/email/sendMail.ts b/backend/src/middleware/helpers/email/sendMail.ts
index 359efc91e..c0e54e7f7 100644
--- a/backend/src/middleware/helpers/email/sendMail.ts
+++ b/backend/src/middleware/helpers/email/sendMail.ts
@@ -5,6 +5,8 @@ import { htmlToText } from 'nodemailer-html-to-text'
 
 const hasEmailConfig = CONFIG.SMTP_HOST && CONFIG.SMTP_PORT
 const hasAuthData = CONFIG.SMTP_USERNAME && CONFIG.SMTP_PASSWORD
+const hasDKIMData =
+  CONFIG.SMTP_DKIM_DOMAINNAME && CONFIG.SMTP_DKIM_KEYSELECTOR && CONFIG.SMTP_DKIM_PRIVATKEY
 
 let sendMailCallback: any = async () => {}
 if (!hasEmailConfig) {
@@ -44,6 +46,11 @@ if (!hasEmailConfig) {
         user: CONFIG.SMTP_USERNAME,
         pass: CONFIG.SMTP_PASSWORD,
       },
+      dkim: hasDKIMData && {
+        domainName: CONFIG.SMTP_DKIM_DOMAINNAME,
+        keySelector: CONFIG.SMTP_DKIM_KEYSELECTOR,
+        privateKey: CONFIG.SMTP_DKIM_PRIVATKEY,
+      },
     })
 
     transporter.use(