Empty heads

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

@@ -556,6 +556,7 @@ public class FragmentAccount extends FragmentBase {
                     iservice.connect(host, Integer.parseInt(port), auth, user, password);
 
                     result.idle = iservice.hasCapability("IDLE");
+                    result.empty = iservice.emptyMessages();
 
                     boolean inbox = false;
 
@@ -625,6 +626,8 @@ public class FragmentAccount extends FragmentBase {
             protected void onExecuted(Bundle args, CheckResult result) {
                 tvIdle.setVisibility(result.idle ? View.GONE : View.VISIBLE);
                 tvUtf8.setVisibility(result.utf8 == null || result.utf8 ? View.GONE : View.VISIBLE);
+                if (result.empty)
+                    cbPartialFetch.setChecked(false);
 
                 setFolders(result.folders, result.account);
 
@@ -1483,5 +1486,6 @@ public class FragmentAccount extends FragmentBase {
         List<EntityFolder> folders;
         boolean idle;
         Boolean utf8;
+        boolean empty;
     }
 }

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

@@ -241,6 +241,7 @@ public class FragmentQuickSetup extends FragmentBase {
                 String user = (provider.user == EmailProvider.UserType.EMAIL ? email : dparts[0]);
                 Log.i("User type=" + provider.user + " name=" + user);
 
+                boolean empty;
                 List<EntityFolder> folders;
 
                 String aprotocol = provider.imap.starttls ? "imap" : "imaps";
@@ -257,6 +258,7 @@ public class FragmentQuickSetup extends FragmentBase {
                             throw ex;
                     }
 
+                    empty = iservice.emptyMessages();
                     folders = iservice.getFolders();
 
                     if (folders == null)
@@ -293,6 +295,9 @@ public class FragmentQuickSetup extends FragmentBase {
                     account.synchronize = true;
                     account.primary = (primary == null);
 
+                    if (empty)
+                        account.partial_fetch = false;
+
                     account.created = new Date().getTime();
                     account.last_connected = account.created;
 

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

@@ -18,6 +18,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ExecutorService;
@@ -38,6 +39,7 @@ public class MailService implements AutoCloseable {
     private Properties properties;
     private Session isession;
     private Service iservice;
+    private boolean empty;
 
     private ExecutorService executor = Helper.getBackgroundExecutor(0, "mail");
 
@@ -264,6 +266,19 @@ public class MailService implements AutoCloseable {
                         for (String key : sid.keySet()) {
                             crumb.put(key, sid.get(key));
                             EntityLog.log(context, "Server " + key + "=" + sid.get(key));
+
+                            if ("name".equals(key)) {
+                                String name = sid.get(key);
+                                if (!TextUtils.isEmpty(name)) {
+                                    name = name.toLowerCase(Locale.ROOT);
+
+                                    // name=Amazon WorkMail IMAP version=1.0
+                                    // name=Microsoft.Exchange.Imap4.Imap4Server version=15
+                                    if ((name.contains("amazon") && name.contains("workmail")) ||
+                                            (name.contains("microsoft") && name.contains("exchange")))
+                                        empty = true;
+                                }
+                            }
                         }
                         Log.breadcrumb("server", crumb);
                     }
@@ -368,6 +383,10 @@ public class MailService implements AutoCloseable {
             return false;
     }
 
+    boolean emptyMessages() {
+        return this.empty;
+    }
+
     public void close() throws MessagingException {
         try {
             if (iservice != null && iservice.isConnected())