diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index 083bd5adac..7cbd0903bd 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -441,6 +441,7 @@ class acp_board
 						'email_enable'			=> array('lang' => 'ENABLE_EMAIL',			'validate' => 'bool',	'type' => 'radio:enabled_disabled', 'explain' => true),
 						'board_email_form'		=> array('lang' => 'BOARD_EMAIL_FORM',		'validate' => 'bool',	'type' => 'radio:enabled_disabled', 'explain' => true),
 						'email_package_size'	=> array('lang' => 'EMAIL_PACKAGE_SIZE',	'validate' => 'int:0',	'type' => 'number:0:99999', 'explain' => true),
+						'email_max_chunk_size'	=> array('lang' => 'EMAIL_MAX_CHUNK_SIZE',	'validate' => 'int:1:99999',	'type' => 'number:1:99999', 'explain' => true),
 						'board_contact'			=> array('lang' => 'CONTACT_EMAIL',			'validate' => 'email',	'type' => 'email:25:100', 'explain' => true),
 						'board_contact_name'	=> array('lang' => 'CONTACT_EMAIL_NAME',	'validate' => 'string',	'type' => 'text:25:50', 'explain' => true),
 						'board_email'			=> array('lang' => 'ADMIN_EMAIL',			'validate' => 'email',	'type' => 'email:25:100', 'explain' => true),
diff --git a/phpBB/language/en/acp/board.php b/phpBB/language/en/acp/board.php
index 10e76cc483..fdc02d9ae8 100644
--- a/phpBB/language/en/acp/board.php
+++ b/phpBB/language/en/acp/board.php
@@ -568,6 +568,8 @@ $lang = array_merge($lang, array(
 	'EMAIL_FORCE_SENDER_EXPLAIN'	=> 'This will set the <samp>Return-Path</samp> to the from email address instead of using the local user and hostname of the server. This setting does not apply when using SMTP.<br><em><strong>Warning:</strong> Requires the user that the webserver runs as to be added as trusted user to the sendmail configuration.</em>',
 	'EMAIL_PACKAGE_SIZE'			=> 'Email package size',
 	'EMAIL_PACKAGE_SIZE_EXPLAIN'	=> 'This is the number of maximum emails sent out in one package. This setting is applied to the internal message queue; set this value to 0 if you have problems with non-delivered notification emails.',
+	'EMAIL_MAX_CHUNK_SIZE'			=> 'Maximum allowed email recipients',
+	'EMAIL_MAX_CHUNK_SIZE_EXPLAIN'	=> 'If necessary, set this to not exceed the maximum number of recipients that your email server will allow in one email message.',
 	'EMAIL_SIG'						=> 'Email signature',
 	'EMAIL_SIG_EXPLAIN'				=> 'This text will be attached to all emails the board sends.',
 	'ENABLE_EMAIL'					=> 'Enable board-wide emails',