Match delivered-to as last

FAQ.md

@@ -1318,6 +1318,7 @@ Note that this is independent of receiving messages.
 Identities are as expected matched by account.
 For incoming messages the *to*, *cc*, *bcc*, *from* and *(X-)delivered/envelope/original-to* addresses will be checked (in this order)
 and for outgoing messages (drafts, outbox and sent) only the *from* addresses will be checked.
+Equal addresses have precedence over partially matching addresses, except for *delivered-to* addresses.
 
 The matched address will be shown as *via* in the addresses section of received messages (between the message header and message text).
 

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

@@ -3113,14 +3113,16 @@ class Core {
                 addresses.addAll(Arrays.asList(message.bcc));
             if (message.from != null)
                 addresses.addAll(Arrays.asList(message.from));
-            if (message.deliveredto != null)
-                try {
-                    addresses.add(new InternetAddress(message.deliveredto));
-                } catch (AddressException ex) {
-                    Log.w(ex);
-                }
         }
 
+        InternetAddress deliveredto = null;
+        if (message.deliveredto != null)
+            try {
+                deliveredto = new InternetAddress(message.deliveredto);
+            } catch (AddressException ex) {
+                Log.w(ex);
+            }
+
         // Search for matching identity
         List<EntityIdentity> identities = db.identity().getSynchronizingIdentities(folder.account);
         if (identities != null) {
@@ -3133,6 +3135,11 @@ class Core {
                 for (EntityIdentity identity : identities)
                     if (identity.similarAddress(address))
                         return identity;
+
+            if (deliveredto != null)
+                for (EntityIdentity identity : identities)
+                    if (identity.sameAddress(deliveredto) || identity.similarAddress(deliveredto))
+                        return identity;
         }
 
         return null;