From 1fc030afe4234891aa3020fa2942eebd4854b400 Mon Sep 17 00:00:00 2001
From: Alysson Ribeiro <15274059+sonalys@users.noreply.github.com>
Date: Thu, 7 Nov 2024 14:59:06 +0100
Subject: [PATCH] Feature(sendError): add unwrap interface

---
 senderror.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/senderror.go b/senderror.go
index 4471208b..9059d78c 100644
--- a/senderror.go
+++ b/senderror.go
@@ -133,6 +133,10 @@ func (e *SendError) Is(errType error) bool {
 	return false
 }
 
+func (e *SendError) Unwrap() []error {
+	return e.errlist
+}
+
 // IsTemp returns true if the delivery error is of a temporary nature and can be retried.
 //
 // This function checks whether the SendError indicates a temporary error, which suggests
@@ -224,3 +228,5 @@ func (r SendErrReason) String() string {
 func isTempError(err error) bool {
 	return err.Error()[0] == '4'
 }
+
+var _ interface{ Unwrap() []error } = &SendError{}