diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ea1619b2416..794e2d8b681 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -20,7 +20,7 @@ You can open a new issue with this [issue form](https://github.com/novuhq/novu/i
 
 ### Requirements
 
-- Node.js version v14.19.3
+- Node.js version v16.15.1
 - MongoDB
 - Redis. To install Redis on your O.S, please follow the below guides
   - [To install Redis on Windows](https://redis.io/docs/getting-started/installation/install-redis-on-windows/)
diff --git a/apps/api/src/app/shared/helpers/content.service.spec.ts b/apps/api/src/app/shared/helpers/content.service.spec.ts
index 1dd0833410d..70f80455447 100644
--- a/apps/api/src/app/shared/helpers/content.service.spec.ts
+++ b/apps/api/src/app/shared/helpers/content.service.spec.ts
@@ -335,4 +335,99 @@ describe('ContentService', function () {
       expect(extractVariables[0].name).to.include('lastName');
     });
   });
+
+  describe('extractStepVariables', () => {
+    it('should not fail if no filters available', () => {
+      const contentService = new ContentService();
+      const messages = [
+        {
+          template: {
+            type: StepTypeEnum.EMAIL,
+            subject: 'Test {{subscriber.firstName}}',
+            content: [
+              {
+                content: 'Test of {{subscriber.firstName}} {{lastName}}',
+                type: 'text',
+              },
+            ],
+          },
+        },
+      ] as INotificationTemplateStep[];
+      const variables = contentService.extractStepVariables(messages);
+
+      expect(variables.length).to.equal(0);
+    });
+
+    it('should not fail if filters are set as non array', () => {
+      const contentService = new ContentService();
+      const messages = [
+        {
+          template: {
+            type: StepTypeEnum.EMAIL,
+            subject: 'Test {{subscriber.firstName}}',
+            content: [
+              {
+                content: 'Test of {{subscriber.firstName}} {{lastName}}',
+                type: 'text',
+              },
+            ],
+          },
+          filters: {},
+        },
+      ] as INotificationTemplateStep[];
+      const variables = contentService.extractStepVariables(messages);
+
+      expect(variables.length).to.equal(0);
+    });
+
+    it('should not fail if filters are an empty array', () => {
+      const contentService = new ContentService();
+      const messages = [
+        {
+          template: {
+            type: StepTypeEnum.EMAIL,
+            subject: 'Test {{subscriber.firstName}}',
+            content: [
+              {
+                content: 'Test of {{subscriber.firstName}} {{lastName}}',
+                type: 'text',
+              },
+            ],
+          },
+          filters: [],
+        },
+      ] as INotificationTemplateStep[];
+      const variables = contentService.extractStepVariables(messages);
+
+      expect(variables.length).to.equal(0);
+    });
+
+    it('should not fail if filters have some wrong settings like missing children in filters', () => {
+      const contentService = new ContentService();
+      const messages = [
+        {
+          template: {
+            type: StepTypeEnum.EMAIL,
+            subject: 'Test {{subscriber.firstName}}',
+            content: [
+              {
+                content: 'Test of {{subscriber.firstName}} {{lastName}}',
+                type: 'text',
+              },
+            ],
+          },
+          filters: [
+            {
+              isNegated: false,
+              type: 'GROUP',
+              value: 'AND',
+            },
+          ],
+        },
+      ] as INotificationTemplateStep[];
+      const variables = contentService.extractStepVariables(messages);
+
+      expect(variables.length).to.equal(0);
+    });
+  });
 });
diff --git a/apps/api/src/app/shared/helpers/content.service.ts b/apps/api/src/app/shared/helpers/content.service.ts
index 6dfcff38f89..4e5c14d9730 100644
--- a/apps/api/src/app/shared/helpers/content.service.ts
+++ b/apps/api/src/app/shared/helpers/content.service.ts
@@ -73,17 +73,19 @@ export class ContentService {
 
     for (const message of messages) {
       if (message.filters) {
-        const filterVariables = message.filters.flatMap((filter) =>
-          filter.children
-            .filter((item) => item.on === FilterPartTypeEnum.PAYLOAD)
-            .map((item: IFieldFilterPart) => {
-              return {
-                name: item.field,
-                type: TemplateVariableTypeEnum.STRING,
-              };
-            })
-        );
-        variables.push(...filterVariables);
+        const filters = Array.isArray(message.filters) ? message.filters : [];
+        const filteredVariables = filters.flatMap((filter) => {
+          const filteredChildren = filter.children?.filter((item) => item.on === FilterPartTypeEnum.PAYLOAD) || [];
+          const mappedChildren = filteredChildren.map((item: IFieldFilterPart) => {
+            return {
+              name: item.field,
+              type: TemplateVariableTypeEnum.STRING,
+            };
+          });
+
+          return mappedChildren;
+        });
+        variables.push(...filteredVariables);
       }
 
       if (message.metadata?.type === DelayTypeEnum.SCHEDULED && message.metadata.delayPath) {
diff --git a/providers/nodemailer/src/lib/nodemailer.provider.ts b/providers/nodemailer/src/lib/nodemailer.provider.ts
index 7c52a221827..0d929257159 100644
--- a/providers/nodemailer/src/lib/nodemailer.provider.ts
+++ b/providers/nodemailer/src/lib/nodemailer.provider.ts
@@ -44,6 +44,7 @@ export class NodemailerProvider implements IEmailProvider {
     const tls: ConnectionOptions = this.getTlsOptions();
 
     const smtpTransportOptions: SMTPTransport.Options = {
+      name: this.config.host,
       host: this.config.host,
       port: this.config.port,
       secure: this.config.secure,