diff --git a/pom.xml b/pom.xml
index e9b39aa..c731112 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>de.nschwalbe</groupId>
     <artifactId>postoffice</artifactId>
-    <version>0.1.2</version>
+    <version>0.1.3</version>
 
     <parent>
         <groupId>org.springframework.boot</groupId>
diff --git a/src/main/java/de/nschwalbe/postoffice/PostOfficeConfiguration.java b/src/main/java/de/nschwalbe/postoffice/PostOfficeConfiguration.java
index f23778e..9040e51 100644
--- a/src/main/java/de/nschwalbe/postoffice/PostOfficeConfiguration.java
+++ b/src/main/java/de/nschwalbe/postoffice/PostOfficeConfiguration.java
@@ -3,6 +3,7 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.Environment;
 import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.scheduling.annotation.SchedulingConfigurer;
@@ -21,14 +22,17 @@ public class PostOfficeConfiguration {
     @Autowired
     private JavaMailSender javaMailSender;
 
+    @Autowired
+    private Environment env;
+
     @Bean
-    public PostOffice mailService(MailStorage mailStorage) {
+    public PostOffice postOffice(MailStorage mailStorage) {
         return new PostOffice(mailStorage, javaMailSender);
     }
 
-    @Bean("mailSendingTriggerTask")
-    public MailSendingTriggerTaskFactory mailSendingTriggerTaskFactory(MailStorage mailStorage) {
-        return new MailSendingTriggerTaskFactory(mailStorage, javaMailSender);
+    @Bean("sendMailTask")
+    public SendMailTaskFactory sendMailTaskFactory(MailStorage mailStorage) {
+        return new SendMailTaskFactory(mailStorage, javaMailSender, env);
     }
 
     @EnableScheduling
@@ -36,13 +40,12 @@ public MailSendingTriggerTaskFactory mailSendingTriggerTaskFactory(MailStorage m
     static class SchedulerConfiguration implements SchedulingConfigurer {
 
         @Autowired
-        private TriggerTask mailSendingTriggerTask;
+        private TriggerTask sendMailTask;
 
-        // TODO not for test
         @Override
         public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
             try {
-                taskRegistrar.addTriggerTask(mailSendingTriggerTask);
+                taskRegistrar.addTriggerTask(sendMailTask);
             } catch (Exception e) {
                 throw new RuntimeException(e);
             }
diff --git a/src/main/java/de/nschwalbe/postoffice/MailSendingTriggerTaskFactory.java b/src/main/java/de/nschwalbe/postoffice/SendMailTaskFactory.java
similarity index 83%
rename from src/main/java/de/nschwalbe/postoffice/MailSendingTriggerTaskFactory.java
rename to src/main/java/de/nschwalbe/postoffice/SendMailTaskFactory.java
index ae2a973..970fc08 100644
--- a/src/main/java/de/nschwalbe/postoffice/MailSendingTriggerTaskFactory.java
+++ b/src/main/java/de/nschwalbe/postoffice/SendMailTaskFactory.java
@@ -13,6 +13,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.config.AbstractFactoryBean;
+import org.springframework.core.env.Environment;
 import org.springframework.mail.MailAuthenticationException;
 import org.springframework.mail.MailException;
 import org.springframework.mail.MailSendException;
@@ -27,14 +28,16 @@
  * @author Nathanael Schwalbe
  * @since 05.04.2017
  */
-class MailSendingTriggerTaskFactory extends AbstractFactoryBean<TriggerTask> {
+class SendMailTaskFactory extends AbstractFactoryBean<TriggerTask> {
 
     private final MailStorage mailStorage;
     private final JavaMailSender javaMailSender;
+    private final Environment env;
 
-    MailSendingTriggerTaskFactory(MailStorage mailStorage,  JavaMailSender javaMailSender) {
+    SendMailTaskFactory(MailStorage mailStorage, JavaMailSender javaMailSender, Environment env) {
         this.mailStorage = mailStorage;
         this.javaMailSender = javaMailSender;
+        this.env = env;
     }
 
     @Override
@@ -44,18 +47,20 @@ public Class<?> getObjectType() {
 
     @Override
     protected TriggerTask createInstance() throws Exception {
-        MailSendingTrigger trigger = new MailSendingTrigger();
-        MailSendingTask task = new MailSendingTask(mailStorage, javaMailSender, trigger);
+        SendMailTrigger trigger = new SendMailTrigger(env.getProperty("postoffice.worker.delay", Integer.class, 10));
+        SendMailTask task = new SendMailTask(mailStorage, javaMailSender, trigger);
         return new TriggerTask(task, trigger);
     }
 
-    static class MailSendingTrigger implements Trigger {
+    static class SendMailTrigger implements Trigger {
 
-        // seconds
-        private int delay = 30;
+        private int defaultDelay;
+        private int delay;
 
-        int getDelay() {
-            return delay;
+
+        SendMailTrigger(int delay) {
+            this.defaultDelay = delay;
+            this.delay = delay;
         }
 
         // try again in 30s, then wait 60s, then wait 90s ...
@@ -70,7 +75,7 @@ void increaseDelay() {
 
 
         void resetDelay() {
-            delay = 30;
+            delay = defaultDelay;
         }
 
         @Override
@@ -90,15 +95,15 @@ public Date nextExecutionTime(TriggerContext triggerContext) {
         }
     }
 
-    static class MailSendingTask implements Runnable {
+    static class SendMailTask implements Runnable {
 
-        private Logger log = LoggerFactory.getLogger(MailSendingTask.class);
+        private Logger log = LoggerFactory.getLogger(SendMailTask.class);
 
         private final MailStorage mailStorage;
         private final JavaMailSender javaMailSender;
-        private final MailSendingTrigger trigger;
+        private final SendMailTrigger trigger;
 
-        MailSendingTask(MailStorage mailStorage, JavaMailSender javaMailSender,  MailSendingTrigger trigger) {
+        SendMailTask(MailStorage mailStorage, JavaMailSender javaMailSender,  SendMailTrigger trigger) {
             this.mailStorage = mailStorage;
             this.javaMailSender = javaMailSender;
             this.trigger = trigger;