Merge #1380

1380: [Roundcube] DKIM sign message delivery reports r=mergify[bot] a=TheLegend875

This PR enables the From header for message delivery reports in Roundcube.
This ensures that the message delivery report is DKIM signed and therefore not not blocked or considered spam by receiving mailservers.


Co-authored-by: TheLegend875 <40040530+TheLegend875@users.noreply.github.com>
Co-authored-by: ofthesun9 <olivier@ofthesun.net>

towncrier/newsfragments/1381.fix

@@ -0,0 +1 @@
+Enable the From header for message delivery report in Roundcube and ensure DKIM Signature 

webmails/roundcube/config.inc.php

@@ -56,3 +56,6 @@ $config['skin'] = 'elastic';
 
 // Enigma gpg plugin
 $config['enigma_pgp_homedir'] = '/data/gpg';
+
+// Set From header for DKIM signed message delivery reports
+$config['mdn_use_from'] = true;