Add a fallback to imap_8bit() for CI_Email::_prep_quoted_printable()

2 files changed, 10 insertions, 3 deletions

diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 698cb7679..fa1d5e9bf 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -1109,9 +1109,16 @@ class CI_Email {
 		// However, many developers choose to override that and violate
 		// the RFC rules due to (apparently) a bug in MS Exchange,
 		// which only works with "\n".
-		if ($this->crlf === "\r\n" && is_php('5.3'))
+		if ($this->crlf === "\r\n")
 		{
-			return quoted_printable_encode($str);
+			if (is_php('5.3'))
+			{
+				return quoted_printable_encode($str);
+			}
+			elseif (function_exists('imap_8bit'))
+			{
+				return imap_8bit($str);
+			}
 		}
 
 		// Reduce multiple spaces & remove nulls
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 8ec32c0fe..bfc2c9556 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -199,7 +199,7 @@ Release Date: Not Released
 	 -  Successfully sent emails will automatically clear the parameters.
 	 -  Added a *return_path* parameter to the ``from()`` method.
 	 -  Removed the second parameter (character limit) from internal method ``_prep_quoted_printable()`` as it is never used.
-	 -  Internal method ``_prep_quoted_printable()`` will now utilize the native ``quoted_printable_encode()`` function on PHP 5.3+ if CRLF is set to "\r\n".
+	 -  Internal method ``_prep_quoted_printable()`` will now utilize the native ``quoted_printable_encode()``, ``imap_8bit()`` functions (if available) when CRLF is set to "\r\n".
 	 -  Default charset now relies on the global ``$config['charset']`` setting.
    -  :doc:`Pagination Library <libraries/pagination>` changes include:
 	 -  Added support for the anchor "rel" attribute.