Added provider xs4all

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

@@ -58,10 +58,11 @@ import java.util.concurrent.Future;
 public class EmailProvider {
     public String name;
     public List<String> domain;
-    public String link;
     public int order;
     public String type;
     public int keepalive;
+    public boolean useip;
+    public String link;
     public Server imap = new Server();
     public Server smtp = new Server();
     public UserType user = UserType.EMAIL;
@@ -104,11 +105,12 @@ public class EmailProvider {
                     else if ("provider".equals(name)) {
                         provider = new EmailProvider();
                         provider.name = xml.getAttributeValue(null, "name");
-                        provider.order = xml.getAttributeIntValue(null, "order", Integer.MAX_VALUE);
-                        provider.keepalive = xml.getAttributeIntValue(null, "keepalive", 0);
                         String domain = xml.getAttributeValue(null, "domain");
                         if (domain != null)
                             provider.domain = Arrays.asList(domain.split(","));
+                        provider.order = xml.getAttributeIntValue(null, "order", Integer.MAX_VALUE);
+                        provider.keepalive = xml.getAttributeIntValue(null, "keepalive", 0);
+                        provider.useip = xml.getAttributeBooleanValue(null, "useip", true);
                         provider.link = xml.getAttributeValue(null, "link");
                         provider.type = xml.getAttributeValue(null, "type");
                         String user = xml.getAttributeValue(null, "user");

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

@@ -242,6 +242,7 @@ public class FragmentIdentity extends FragmentBase {
                             etHost.setText(provider.smtp.host);
                             etPort.setText(Integer.toString(provider.smtp.port));
                             rgEncryption.check(provider.smtp.starttls ? R.id.radio_starttls : R.id.radio_ssl);
+                            cbUseIp.setChecked(provider.useip);
 
                             break;
                         }
@@ -357,6 +358,7 @@ public class FragmentIdentity extends FragmentBase {
                 etHost.setText(provider.smtp.host);
                 etPort.setText(position == 0 ? null : Integer.toString(provider.smtp.port));
                 rgEncryption.check(provider.smtp.starttls ? R.id.radio_starttls : R.id.radio_ssl);
+                cbUseIp.setChecked(provider.useip);
             }
 
             @Override
@@ -470,6 +472,7 @@ public class FragmentIdentity extends FragmentBase {
                 etHost.setText(provider.smtp.host);
                 etPort.setText(Integer.toString(provider.smtp.port));
                 rgEncryption.check(provider.smtp.starttls ? R.id.radio_starttls : R.id.radio_ssl);
+                cbUseIp.setChecked(provider.useip);
             }
 
             @Override

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

@@ -268,6 +268,7 @@ public class FragmentQuickSetup extends FragmentBase {
 
                 String iprotocol = provider.smtp.starttls ? "smtp" : "smtps";
                 try (MailService iservice = new MailService(context, iprotocol, null, false, true, true)) {
+                    iservice.setUseIp(provider.useip);
                     iservice.connect(provider.smtp.host, provider.smtp.port, MailService.AUTH_TYPE_PASSWORD, user, password);
                 }
 
@@ -333,6 +334,7 @@ public class FragmentQuickSetup extends FragmentBase {
                     identity.auth_type = MailService.AUTH_TYPE_PASSWORD;
                     identity.user = user;
                     identity.password = password;
+                    identity.use_ip = provider.useip;
                     identity.synchronize = true;
                     identity.primary = true;
 

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

@@ -372,4 +372,17 @@
             port="587"
             starttls="true" />
     </provider>
+    <provider
+        name="XS4ALL"
+        link="https://www.xs4all.nl/service/diensten/email/installeren/e-mailinstellingen.htm"
+        useip="false">
+        <imap
+            host="imap.xs4all.nl"
+            port="993"
+            starttls="false" />
+        <smtp
+            host="smtp.xs4all.nl"
+            port="465"
+            starttls="false" />
+    </provider>
 </providers>