diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/deduplication/TbMsgDeduplicationNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/deduplication/TbMsgDeduplicationNode.java
index defc3fed0a..043cc7793f 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/deduplication/TbMsgDeduplicationNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/deduplication/TbMsgDeduplicationNode.java
@@ -49,10 +49,10 @@ import java.util.concurrent.TimeUnit;
         configClazz = TbMsgDeduplicationNodeConfiguration.class,
         nodeDescription = "Deduplicate messages within the same originator entity for a configurable period " +
                 "based on a specified deduplication strategy.",
-        nodeDetails = "Deduplication strategy: <ul><li><strong>FIRST</strong> - return first message that arrived during deduplication period.</li>" +
+        nodeDetails = "Deduplication strategies: <ul><li><strong>FIRST</strong> - return first message that arrived during deduplication period.</li>" +
                 "<li><strong>LAST</strong> - return last message that arrived during deduplication period.</li>" +
                 "<li><strong>ALL</strong> - return all messages as a single JSON array message. " +
-                "Where each element represents object with <i>msg</i> and <i>metadata</i> inner properties.</li></ul>",
+                "Where each element represents object with <strong><i>msg</i></strong> and <strong><i>metadata</i></strong> inner properties.</li></ul>",
         icon = "content_copy",
         uiResources = {"static/rulenode/rulenode-core-config.js"},
         configDirective = "tbActionNodeMsgDeduplicationConfig"
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNode.java
index f16d5bc666..cb7b7d118b 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNode.java
@@ -16,7 +16,6 @@
 package org.thingsboard.rule.engine.mail;
 
 import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.JsonNode;
 import lombok.extern.slf4j.Slf4j;
 import org.thingsboard.common.util.JacksonUtil;
 import org.thingsboard.rule.engine.api.RuleNode;
@@ -30,7 +29,6 @@ import org.thingsboard.server.common.data.StringUtils;
 import org.thingsboard.server.common.data.msg.TbMsgType;
 import org.thingsboard.server.common.data.msg.TbNodeConnectionType;
 import org.thingsboard.server.common.data.plugin.ComponentType;
-import org.thingsboard.server.common.data.util.TbPair;
 import org.thingsboard.server.common.msg.TbMsg;
 
 import java.util.HashMap;
@@ -42,9 +40,13 @@ import java.util.Map;
         name = "to email",
         configClazz = TbMsgToEmailNodeConfiguration.class,
         nodeDescription = "Transforms message to email message",
-        nodeDetails = "Transforms message to email message. All email fields support templatization. " +
-                "Supports adding inline base64 images to the mail body from message metadata by checking for the <strong><i>images</i></strong> metadata key " +
-                "that should represent a map of entries: contentId to based64 image value.<br><br>" +
+        nodeDetails = "Transforms message to email message. All email fields support templatization.<br><br>" +
+                "Additionally, supports adding inline base64 images to the mail body from message metadata " +
+                "by extracting them from <strong><i>images</i></strong> metadata key-value.<br>" +
+                "<strong><i>images</strong></i> key-value should represent a map of entries: <strong><i>cid --> encodedImage</i></strong>.<br>" +
+                "E.g., <strong><i>cid</i></strong> is a <strong><i>tb.example.png</i></strong> and<br>" +
+                "<strong><i>encodedImage</i></strong> is a <strong><i>data:image/png;base64,...</i></strong>, " +
+                "then you can use <i><strong>img</i></strong> HTML tag with src: <i><strong>cid:tb.example.png</i></strong>.<br><br>" +
                 "Set <code>SEND_EMAIL</code> output message type if transformation completed successfully.<br><br>"  +
                 "Output connections: <code>Success</code>, <code>Failure</code>.",
         uiResources = {"static/rulenode/rulenode-core-config.js"},
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java
index a26cec57ee..a88a87b400 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbChangeOriginatorNode.java
@@ -44,10 +44,10 @@ import java.util.NoSuchElementException;
         name = "change originator",
         configClazz = TbChangeOriginatorNodeConfiguration.class,
         nodeDescription = "Change message originator to Tenant/Customer/Related Entity/Alarm Originator/Entity by name pattern.",
-        nodeDetails = "Configuration: <ul><li><strong>Tenant</strong> - use current tenant as new originator.</li>" +
-                "<li><strong>Customer</strong> - use customer of incoming message originator as new originator. " +
-                "Only for originators with one of the following type: 'User', 'Asset', 'Device' that assigned to customers.</li>" +
-                "<li><strong>Related Entity</strong> - use related entity as new originator. Lookup based on configured relation direction and relation type. " +
+        nodeDetails = "Configuration: <ul><li><strong>Customer</strong> - use customer of incoming message originator as new originator. " +
+                "Only for assigned to customer originators with one of the following type: 'User', 'Asset', 'Device'.</li>" +
+                "<li><strong>Tenant</strong> - use current tenant as new originator.</li>" +
+                "<li><strong>Related Entity</strong> - use related entity as new originator. Lookup based on configured relation type and direction. " +
                 "If multiple related entities are found, only first entity is used as new originator, other entities are discarded.</li>" +
                 "<li><strong>Alarm Originator</strong> - use alarm originator as new originator. Only if incoming message originator is alarm entity.</li>" +
                 "<li><strong>Entity by name pattern</strong> - new originator lookup requires selection one of the following entity types: " +
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java
index 25467caf5a..e346c6a0cd 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbCopyKeysNode.java
@@ -81,7 +81,7 @@ public class TbCopyKeysNode extends TbAbstractTransformNodeWithTbMsgSource {
                     Map<String, String> metaDataMap = metaDataCopy.getData();
                     for (Map.Entry<String, String> entry : metaDataMap.entrySet()) {
                         String keyData = entry.getKey();
-                        if (checkKey(keyData)) {
+                        if (matches(keyData)) {
                             msgChanged = true;
                             msgDataNode.put(keyData, entry.getValue());
                         }
@@ -93,7 +93,7 @@ public class TbCopyKeysNode extends TbAbstractTransformNodeWithTbMsgSource {
                     while (iteratorNode.hasNext()) {
                         Map.Entry<String, JsonNode> entry = iteratorNode.next();
                         String keyData = entry.getKey();
-                        if (checkKey(keyData)) {
+                        if (matches(keyData)) {
                             msgChanged = true;
                             metaDataCopy.putValue(keyData, JacksonUtil.toString(entry.getValue()));
                         }
@@ -112,7 +112,7 @@ public class TbCopyKeysNode extends TbAbstractTransformNodeWithTbMsgSource {
         return "copyFrom";
     }
 
-    boolean checkKey(String key) {
+    boolean matches(String key) {
         return patternKeys.stream().anyMatch(pattern -> pattern.matcher(key).matches());
     }
 
diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbDeleteKeysNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbDeleteKeysNode.java
index 15ed71b0ae..30e182a254 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbDeleteKeysNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/transform/TbDeleteKeysNode.java
@@ -76,7 +76,7 @@ public class TbDeleteKeysNode extends TbAbstractTransformNodeWithTbMsgSource {
             case METADATA:
                 Map<String, String> metaDataMap = metaDataCopy.getData();
                 metaDataMap.forEach((keyMetaData, valueMetaData) -> {
-                    if (checkKey(keyMetaData)) {
+                    if (matches(keyMetaData)) {
                         keysToDelete.add(keyMetaData);
                     }
                 });
@@ -89,7 +89,7 @@ public class TbDeleteKeysNode extends TbAbstractTransformNodeWithTbMsgSource {
                     ObjectNode msgDataObject = (ObjectNode) dataNode;
                     dataNode.fields().forEachRemaining(entry -> {
                         String keyData = entry.getKey();
-                        if (checkKey(keyData)) {
+                        if (matches(keyData)) {
                             keysToDelete.add(keyData);
                         }
                     });
@@ -109,7 +109,7 @@ public class TbDeleteKeysNode extends TbAbstractTransformNodeWithTbMsgSource {
         return "deleteFrom";
     }
 
-    boolean checkKey(String key) {
+    boolean matches(String key) {
         return patternKeys.stream().anyMatch(pattern -> pattern.matcher(key).matches());
     }
 
diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNodeTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNodeTest.java
index 4f1b0488d7..a351022341 100644
--- a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNodeTest.java
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNodeTest.java
@@ -84,16 +84,6 @@ public class TbMsgToEmailNodeTest {
         assertThat(config.getBodyTemplate()).isEqualTo("Device ${deviceName} has high temperature $[temperature]");
     }
 
-    static Stream<MailBodyTypeTestConfig> MailBodyTypeTestConfig() {
-        return Stream.of(
-                new MailBodyTypeTestConfig(false, "false", null),
-                new MailBodyTypeTestConfig(false, null, null),
-                new MailBodyTypeTestConfig(false, DYNAMIC_MAIL_BODY_TYPE, "false"),
-                new MailBodyTypeTestConfig(true, DYNAMIC_MAIL_BODY_TYPE, "true"),
-                new MailBodyTypeTestConfig(true, "true", null)
-        );
-    }
-
     @ParameterizedTest
     @MethodSource("MailBodyTypeTestConfig")
     public void givenMailBodyTypeTestConfig_whenOnMsg_thenVerify(MailBodyTypeTestConfig testConfig) throws TbNodeException {
@@ -109,8 +99,8 @@ public class TbMsgToEmailNodeTest {
         md.putValue("userEmail", EXPECTED_TO_EMAIL);
         md.putValue("deviceType", EXPECTED_DEVICE_TYPE);
         md.putValue("deviceName", EXPECTED_DEVICE_NAME);
-        if (testConfig.getMdValue() != null) {
-            md.putValue("html", testConfig.getMdValue());
+        if (testConfig.getIsHtmlTemplateMdValue() != null) {
+            md.putValue("html", testConfig.getIsHtmlTemplateMdValue());
         }
 
         var msgDataStr = "{\"temperature\": " + EXPECTED_TEMPERATURE + "}";
@@ -154,12 +144,22 @@ public class TbMsgToEmailNodeTest {
                 .build();
     }
 
+    static Stream<MailBodyTypeTestConfig> MailBodyTypeTestConfig() {
+        return Stream.of(
+                new MailBodyTypeTestConfig(false, "false", null),
+                new MailBodyTypeTestConfig(false, null, null),
+                new MailBodyTypeTestConfig(false, DYNAMIC_MAIL_BODY_TYPE, "false"),
+                new MailBodyTypeTestConfig(true, DYNAMIC_MAIL_BODY_TYPE, "true"),
+                new MailBodyTypeTestConfig(true, "true", null)
+        );
+    }
+
     @Data
     @RequiredArgsConstructor
     static class MailBodyTypeTestConfig {
         private final boolean expectedHtmlValue;
         private final String mailBodyType;
-        private final String mdValue;
+        private final String isHtmlTemplateMdValue;
     }
 
 }