Fix #4192

1 files changed, 8 insertions, 5 deletions

diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index acf3629c3..ebff7567a 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -1563,11 +1563,10 @@ class CI_Email {
 
 		if ($this->charset === 'UTF-8')
 		{
-			if (MB_ENABLED === TRUE)
-			{
-				return mb_encode_mimeheader($str, $this->charset, 'Q', $this->crlf);
-			}
-			elseif (ICONV_ENABLED === TRUE)
+			// Note: We used to have mb_encode_mimeheader() as the first choice
+			//       here, but it turned out to be buggy and unreliable. DO NOT
+			//       re-add it! -- Narf
+			if (ICONV_ENABLED === TRUE)
 			{
 				$output = @iconv_mime_encode('', $str,
 					array(
@@ -1590,6 +1589,10 @@ class CI_Email {
 
 				$chars = iconv_strlen($str, 'UTF-8');
 			}
+			elseif (MB_ENABLED === TRUE)
+			{
+				$chars = mb_strlen($str, 'UTF-8');
+			}
 		}
 
 		// We might already have this set for UTF-8