diff --git a/src/app/models/outbound-mail.ts b/src/app/models/outbound-mail.ts
index 522678d..92b4ef5 100644
--- a/src/app/models/outbound-mail.ts
+++ b/src/app/models/outbound-mail.ts
@@ -9,5 +9,7 @@ export class OutboundMail {
     "public-key": "",
     "subject": ""
   };
+  public envelope: string = "0x01";
+  public "encryption-method-name": string = "aes256cbc";
 }
 
diff --git a/src/app/services/mailchain/messages/send.service.spec.ts b/src/app/services/mailchain/messages/send.service.spec.ts
index 68cb286..5145c34 100644
--- a/src/app/services/mailchain/messages/send.service.spec.ts
+++ b/src/app/services/mailchain/messages/send.service.spec.ts
@@ -113,5 +113,27 @@ describe('SendService', () => {
       expect(req.request.method).toBe("POST");
       req.flush(body);
     })
+
+    it('should specify envelope type "0x01" in the outbound mail', () => {
+      let outboundMailObject = mailchainTestService.outboundMailObject()
+      expect(outboundMailObject.envelope).toBe("0x01")
+    })
+
+    it('should error on send if envelope type is empty in the outbound mail', () => {
+      // TODO add test for: should error on send if envelope type is empty in the outbound mail
+      // let outboundMailObject = mailchainTestService.outboundMailObject()
+      // outboundMailObject.envelope = ""
+    })
+
+    it('should specify encryption-method-name as "aes256cbc" in the outbound mail', () => {
+      let outboundMailObject = mailchainTestService.outboundMailObject()
+      expect(outboundMailObject["encryption-method-name"]).toBe("aes256cbc")
+    })
+
+    it('should error on send if encryption-method-name is empty in the outbound mail', () => {
+      // TODO add test for: should error on send if encryption-method-name is empty in the outbound mail
+      // let outboundMailObject = mailchainTestService.outboundMailObject()
+      // outboundMailObject["encryption-method-name"] = ""
+    })
   })
 });