Partial fetch configuration

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

@@ -62,6 +62,7 @@ public class EmailProvider {
     public int order;
     public String type;
     public int keepalive;
+    public boolean partial;
     public boolean useip;
     public String link;
     public Server imap = new Server();
@@ -111,6 +112,7 @@ public class EmailProvider {
                             provider.domain = Arrays.asList(domain.split(","));
                         provider.order = xml.getAttributeIntValue(null, "order", Integer.MAX_VALUE);
                         provider.keepalive = xml.getAttributeIntValue(null, "keepalive", 0);
+                        provider.partial = xml.getAttributeBooleanValue(null, "partial", true);
                         provider.useip = xml.getAttributeBooleanValue(null, "useip", true);
                         provider.link = xml.getAttributeValue(null, "link");
                         provider.type = xml.getAttributeValue(null, "type");
@@ -191,6 +193,10 @@ public class EmailProvider {
                 return provider;
             }
 
+        // https://docs.aws.amazon.com/workmail/latest/userguide/using_IMAP_client.html
+        if (autoconfig.imap.host.endsWith(".awsapps.com"))
+            autoconfig.partial = false;
+
         return autoconfig;
     }
 

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

@@ -272,6 +272,7 @@ public class FragmentAccount extends FragmentBase {
 
                 etName.setText(position > 1 ? provider.name : null);
                 etInterval.setText(provider.keepalive > 0 ? Integer.toString(provider.keepalive) : null);
+                cbPartialFetch.setChecked(provider.partial);
 
                 grpFolders.setVisibility(View.GONE);
                 btnSave.setVisibility(View.GONE);
@@ -559,7 +560,6 @@ 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;
 
@@ -631,8 +631,6 @@ public class FragmentAccount extends FragmentBase {
                 tvUtf8.setVisibility(result.utf8 == null || result.utf8 ? View.GONE : View.VISIBLE);
                 if (!result.idle)
                     etInterval.setText(Integer.toString(EntityAccount.DEFAULT_POLL_INTERVAL));
-                if (result.empty)
-                    cbPartialFetch.setChecked(false);
 
                 setFolders(result.folders, result.account);
 
@@ -1552,6 +1550,5 @@ public class FragmentAccount extends FragmentBase {
         List<EntityFolder> folders;
         boolean idle;
         Boolean utf8;
-        boolean empty;
     }
 }

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

@@ -245,7 +245,6 @@ public class FragmentQuickSetup extends FragmentBase {
                 String user = (provider.user == EmailProvider.UserType.EMAIL ? email : username);
                 Log.i("User type=" + provider.user + " name=" + user);
 
-                boolean empty;
                 List<EntityFolder> folders;
 
                 String aprotocol = provider.imap.starttls ? "imap" : "imaps";
@@ -262,7 +261,6 @@ public class FragmentQuickSetup extends FragmentBase {
                             throw ex;
                     }
 
-                    empty = iservice.emptyMessages();
                     folders = iservice.getFolders();
 
                     if (folders == null)
@@ -299,8 +297,10 @@ public class FragmentQuickSetup extends FragmentBase {
                     account.synchronize = true;
                     account.primary = (primary == null);
 
-                    if (empty)
+                    if (provider.keepalive > 0)
-                        account.partial_fetch = false;
+                        account.poll_interval = provider.keepalive;
+
+                    account.partial_fetch = provider.partial;
 
                     account.created = new Date().getTime();
                     account.last_connected = account.created;

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

@@ -23,7 +23,6 @@ import java.util.Collections;
 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;
@@ -44,7 +43,6 @@ public class MailService implements AutoCloseable {
     private Properties properties;
     private Session isession;
     private Service iservice;
-    private boolean empty;
 
     private ExecutorService executor = Helper.getBackgroundExecutor(0, "mail");
 
@@ -282,19 +280,6 @@ 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);
                     }
@@ -401,10 +386,6 @@ public class MailService implements AutoCloseable {
             return false;
     }
 
-    boolean emptyMessages() {
-        return this.empty;
-    }
-
     public void close() throws MessagingException {
         try {
             if (iservice != null && iservice.isConnected())

app/src/main/res/xml/providers.xml

@@ -19,7 +19,8 @@
         name="Outlook/Office365"
         domain="outlook\\..*,live\\..*,hotmail\\..*"
         link="https://github.com/M66B/FairEmail/blob/master/FAQ.md#user-content-faq14"
-        order="2">
+        order="2"
+        partial="false">
         <imap
             host="outlook.office365.com"
             port="993"