diff --git a/js/qsm-quiz.js b/js/qsm-quiz.js
index 171674df1..d29d022d3 100644
--- a/js/qsm-quiz.js
+++ b/js/qsm-quiz.js
@@ -596,13 +596,28 @@ function isValidDomains(email, domains) {
 	if (0 == domains.length) {
 		return true;
 	}
-	for (var i = 0; i < domains.length; i++) {
+	for (let i = 0; i < domains.length; i++) {
 		if (email.indexOf(domains[i]) != -1) {
 			return true;
 		}
 	}
 	return false;
 }
+function isBlockedDomain(email, blockdomains) {
+    if (typeof blockdomains === 'undefined') {
+        return false;
+    }
+    if (blockdomains.length === 0) {
+        return false;
+    }
+    for (let i = 0; i < blockdomains.length; i++) {
+        if (email.indexOf(blockdomains[i]) !== -1) {
+            return true;
+        }
+    }
+    return false;
+}
+
 /**
  * Validates a URL.
  *
@@ -732,6 +747,16 @@ function qmnValidation(element, quiz_form_id) {
 						show_result_validation = false;
 					}
 				}
+				/**
+				 * Validate email from blocked domains.
+				 */
+				let blockdomains = jQuery(this).attr('data-blockdomains');
+				if (typeof blockdomains !== 'undefined') {
+					if (isBlockedDomain(x, blockdomains.split(","))) {
+						qmnDisplayError(error_messages.email_error_text, jQuery(this), quiz_form_id);
+						show_result_validation = false;
+					}
+				}
 			}
 			if (jQuery(this).attr('class').indexOf('mlwUrl') !== -1 && this.value !== "") {
 				// Remove any trailing and preceeding space.
diff --git a/php/admin/options-page-contact-tab.php b/php/admin/options-page-contact-tab.php
index 7e643a536..a6d8966e2 100644
--- a/php/admin/options-page-contact-tab.php
+++ b/php/admin/options-page-contact-tab.php
@@ -200,6 +200,11 @@ function qsm_options_contact_tab_template() {
 					<em><?php esc_html_e('Leave blank to allow all domains. ', 'quiz-master-next');?></em><br/>
 					<em><?php esc_html_e('Comma separated list of domains. (i.e. example.com,abc.com)', 'quiz-master-next');?></em>
 				</div>
+				<div class="qsm-contact-form-group qsm-email-option">
+					<label class="qsm-contact-form-label"><?php esc_html_e('Block Domains', 'quiz-master-next');?></label>
+					<textarea class="qsm-contact-form-control" name="blockdomains">{{data.blockdomains}}</textarea>
+					<em><?php esc_html_e('Comma separated list of domains. (i.e. example.com,abc.com)', 'quiz-master-next');?></em>
+				</div>
 			</div>
 		</div>
 	</script>
diff --git a/php/classes/class-qsm-contact-manager.php b/php/classes/class-qsm-contact-manager.php
index 758e9b5fa..4fd703457 100644
--- a/php/classes/class-qsm-contact-manager.php
+++ b/php/classes/class-qsm-contact-manager.php
@@ -372,6 +372,18 @@ public static function save_fields( $quiz_id, $fields ) {
 
 					$fields[ $i ]['allowdomains'] = implode( ',', $allowdomains );
 				}
+				// Validate blocked domains
+				if ( ! empty( $fields[ $i ]['blockdomains'] ) ) {
+					$blockdomains = explode( ',', $fields[ $i ]['blockdomains'] );
+					// Trim domains
+					$blockdomains = array_map( 'trim', $blockdomains );
+					// Filter domain
+					$blockdomains = array_filter( $blockdomains, function( $blockdomain ) {
+						return preg_match( '/^([a-zA-Z0-9-]{1,63}\.)+[a-zA-Z]{2,63}$/', $blockdomain ) && ( strlen( $blockdomain ) <= 253 );
+					} );
+
+					$fields[ $i ]['blockdomains'] = implode( ',', $blockdomains );
+				}
 				if ( ! empty( $fields[ $i ]['options'] ) ) {
 					$options = sanitize_text_field( wp_unslash( $fields[ $i ]['options'] ) );
 					$fields[ $i ]['options']  = $options;
@@ -476,6 +488,11 @@ public static function generate_contact_field( $field, $index, $quiz_options, $d
 					$allowdomains    = array_map( 'trim', explode( ',', $field['allowdomains'] ) );
 					$fieldAttr       .= " data-domains='" . implode( ',', array_filter( $allowdomains ) ) . "' ";
 				}
+				// Add code to block specific domains
+				if ( isset( $field['blockdomains'] ) && ! empty( $field['blockdomains'] ) ) {
+					$blockdomains = array_map( 'trim', explode( ',', $field['blockdomains'] ) );
+					$fieldAttr   .= " data-blockdomains='" . implode( ',', array_filter( $blockdomains ) ) . "' ";
+				}
 				$class       = apply_filters( 'qsm_contact_email_field_class', $class, $field['use'] );
 				$fieldAttr   .= " placeholder='" . esc_attr( wp_strip_all_tags( $field_placeholder ) ) . "' ";
 				if ( ! isset( $field['hide_label'] ) || 'true' != $field['hide_label'] ) {