diff --git a/src/connection/connection.js b/src/connection/connection.js
index 3fef462..00db325 100644
--- a/src/connection/connection.js
+++ b/src/connection/connection.js
@@ -521,10 +521,23 @@ class Connection extends EventEmitter {
         return new Promise(async (resolve, reject) => {
             try {
 
-                // resolve with the first sent response
-                this.once(Constants.ResponseCodes.Sent, (response) => {
+                // resolve promise when we receive sent response
+                const onSent = (response) => {
+                    this.off(Constants.ResponseCodes.Sent, onSent);
+                    this.off(Constants.ResponseCodes.Err, onErr);
                     resolve(response);
-                });
+                }
+
+                // reject promise when we receive err
+                const onErr = () => {
+                    this.off(Constants.ResponseCodes.Sent, onSent);
+                    this.off(Constants.ResponseCodes.Err, onErr);
+                    reject();
+                }
+
+                // listen for events
+                this.once(Constants.ResponseCodes.Sent, onSent);
+                this.once(Constants.ResponseCodes.Err, onErr);
 
                 // compose message
                 const txtType = Constants.TxtTypes.Plain;