Fix bug where PDF attachments marked as inline could have not been attached on mail forward (#7382)

CHANGELOG

@@ -33,6 +33,7 @@ CHANGELOG Roundcube Webmail
 - Fix PHP warning: count(): Parameter must be an array or an object... in ID command handler (#7392)
 - Fix error when user-configured skin does not exist anymore (#7271)
 - Elastic: Fix aspect ratio of a contact photo in mail preview (#7339)
+- Fix bug where PDF attachments marked as inline could have not been attached on mail forward (#7382)
 
 RELEASE 1.4.4
 -------------

program/steps/mail/compose.inc

@@ -982,8 +982,9 @@ function rcmail_write_compose_attachments(&$message, $bodyIsHtml, &$message_body
 
             $replace = null;
 
-            // skip inline images when not used in the body
-            if ($part->disposition == 'inline') {
+            // Skip inline images when not used in the body
+            // Note: Apple Mail sends PDF files marked as inline (#7382)
+            if ($part->disposition == 'inline' && $part->mimetype != 'application/pdf') {
                 if (!$bodyIsHtml) {
                     continue;
                 }