diff --git a/content/roadmaps/102-devops/content/103-networking-protocols/103-emails/106-domain-keys.md b/content/roadmaps/102-devops/content/103-networking-protocols/103-emails/106-domain-keys.md
index 01e957dd1..2c5b94c16 100644
--- a/content/roadmaps/102-devops/content/103-networking-protocols/103-emails/106-domain-keys.md
+++ b/content/roadmaps/102-devops/content/103-networking-protocols/103-emails/106-domain-keys.md
@@ -1 +1,6 @@
-# Domain keys
\ No newline at end of file
+# Domain Keys
+
+DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect forged sender addresses in email (email spoofing), a technique often used in phishing and email spam.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink badgeText='Read' colorScheme='blue' href='https://www.brainkart.com/article/DomainKeys-Identified-Mail_8493/'>DomainKeys Identified Mail</BadgeLink>