use the php_eol constant for encoded subjects

Zotlabs/Module/Dreport.php

@@ -159,6 +159,7 @@ class Dreport extends \Zotlabs\Web\Controller {
 			'$title' => sprintf( t('Delivery report for %1$s'),basename($mid)) . '...',
 			'$table' => $table,
 			'$mid' => urlencode($mid),
+			'$safe_mid' => urlencode(gen_link_id($mid)),
 			'$options' => t('Options'),
 			'$push' => t('Redeliver'),
 			'$entries' => $entries

include/network.php

@@ -895,7 +895,7 @@ function email_header_encode($in_str, $charset = 'UTF-8', $header = 'Subject') {
 		// define start delimimter, end delimiter and spacer
 		$end = "?=";
 		$start = "=?" . $charset . "?B?";
-		$spacer = $end . "\r\n " . $start;
+		$spacer = $end . PHP_EOL . " " . $start;
 
 		// determine length of encoded text within chunks
 		// and ensure length is even

view/tpl/dreport.tpl

@@ -6,7 +6,7 @@
 				<i class="fa fa-sort-desc"></i>
 			</button>
 			<ul class="dropdown-menu">
-				<li><a href="dreport/push/{{$mid}}">{{$push}}</a></li>
+				<li><a href="dreport/push/{{$safe_mid}}">{{$push}}</a></li>
 			</ul>
 		</div>
 		{{/if}}