Fix #4343
diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 034586a..754dd17 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -1854,8 +1854,7 @@
 		// is popen() enabled?
 		if ( ! function_usable('popen')
 			OR FALSE === ($fp = @popen(
-						$this->mailpath.' -oi -f '.$this->clean_email($this->_headers['From'])
-							.' -t -r '.$this->clean_email($this->_headers['Return-Path'])
+						$this->mailpath.' -oi -f '.$this->clean_email($this->_headers['From']).' -t'
 						, 'w'))
 		) // server probably has popen disabled, so nothing we can do to get a verbose error.
 		{
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 3f22048..09b51ce 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -29,6 +29,7 @@
 -  Fixed a bug (#4312) - :doc:`Form Validation Library <libraries/form_validation>` didn't provide error feedback for failed validation on empty requests.
 -  Fixed a bug where :doc:`Database <database/index>` method `version()` returned banner text instead of only the version number with the 'oci8' and 'pdo/oci' drivers.
 -  Fixed a bug (#4331) - :doc:`Database <database/index>` method ``error()`` didn't really work for connection errors with the 'mysqli' driver.
+-  Fixed a bug (#4343) - :doc:`Email Library <libraries/email>` failing with a *"More than one 'from' person"* message when using *sendmail*.
 
 Version 3.0.3
 =============