Send quota email to domain owner or master admin separately https://www.virtualmin.com/node/27493

quota/email.pl

@@ -219,8 +219,16 @@ else {
 	}
 &mailboxes::send_text_mail($from || &mailboxes::get_from_address(),
 			   $addr,
-			   $ccaddr,
+			   undef,
 			   $subject,
 			   $body);
+if ($ccaddr) {
+	# Also send to other address (like the domain owner)
+	&mailboxes::send_text_mail($from || &mailboxes::get_from_address(),
+				   $ccaddr,
+				   undef,
+				   $subject,
+				   $body);
+	}
 }
 

quota/lang/en

@@ -281,8 +281,8 @@ lusers_domain=Domain for user addresses
 luser_virtualmin=Get domain from Virtualmin?
 lusers_from=From: address for email
 lusers_mass=Update Selected Users
-lusers_cc=Also Cc: email to
-lusers_nocc=Don't Cc
+lusers_cc=Also send email to
+lusers_nocc=Nobody
 
 grace_seconds=Seconds
 grace_minutes=Minutes