TLS: added MTA phrase

app/src/main/java/eu/faircode/email/MessageHelper.java

@@ -2891,8 +2891,10 @@ public class MessageHelper {
         }
 
         // (qmail nnn invoked by uid nnn); 1 Jan 2022 00:00:00 -0000
+        // by <host name> (MTA, from userid nnn)
         // by <host name> (Postfix, from userid nnn)
         if (header.matches(".*\\(qmail \\d+ invoked by uid \\d+\\).*") ||
+                header.matches(".*\\(MTA, from userid \\d+\\).*") ||
                 header.matches(".*\\(Postfix, from userid \\d+\\).*")) {
             Log.i("--- phrase");
             return true;