Search identity on lower case email address

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

@@ -401,8 +401,11 @@ public class FragmentIdentity extends FragmentEx {
                         if (TextUtils.isEmpty(password) && !insecure)
                             throw new IllegalArgumentException(getContext().getString(R.string.title_no_password));
 
+                        email = email.toLowerCase();
                         if (TextUtils.isEmpty(replyto))
                             replyto = null;
+                        else
+                            replyto = replyto.toLowerCase();
                         if (Color.TRANSPARENT == color)
                             color = null;
 

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

@@ -1874,10 +1874,13 @@ public class ServiceSynchronize extends LifecycleService {
             EntityIdentity identity = null;
             if (tos != null && tos.length > 0) {
                 String to = ((InternetAddress) tos[0]).getAddress();
+                if (!TextUtils.isEmpty(to)) {
+                    to = to.toLowerCase();
                     identity = db.identity().getIdentity(folder.account, to);
                     if (identity == null)
                         identity = db.identity().getIdentity(folder.account, Helper.canonicalAddress(to));
                 }
+            }
 
             message = new EntityMessage();
             message.account = folder.account;