Odesílání mailů se spouští asynchronně, takže se neblokuje UI.

src/main/java/info/bukova/isspst/mail/MailerWithAttachement.java

@@ -8,6 +8,7 @@ import org.springframework.core.io.InputStreamSource;
 import org.springframework.mail.MailParseException;
 import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.scheduling.annotation.Async;
 
 public class MailerWithAttachement implements Mailer {
 	
@@ -19,6 +20,7 @@ public class MailerWithAttachement implements Mailer {
 	}
 	
 	@Override
+	@Async
 	public void send(MailMessage message) {
 		MimeMessage mimeMessage = sender.createMimeMessage();
 

src/main/java/info/bukova/isspst/mail/SimpleMailer.java

@@ -1,6 +1,7 @@
 package info.bukova.isspst.mail;
 
 import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.scheduling.annotation.Async;
 
 public class SimpleMailer implements Mailer {
 	
@@ -12,6 +13,7 @@ public class SimpleMailer implements Mailer {
 	}
 
 	@Override
+	@Async
 	public void send(MailMessage message) {
 		if (message.getFrom() == null || message.getFrom().isEmpty()) {
 			if (from == null || from.isEmpty()) {

src/main/webapp/WEB-INF/spring/root-context.xml

@@ -1,16 +1,26 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:security="http://www.springframework.org/schema/security" xmlns:context="http://www.springframework.org/schema/context"
+<beans xmlns="http://www.springframework.org/schema/beans" 
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+	xmlns:p="http://www.springframework.org/schema/p" 
+	xmlns:tx="http://www.springframework.org/schema/tx" 
+	xmlns:aop="http://www.springframework.org/schema/aop" 
+	xmlns:security="http://www.springframework.org/schema/security" 
+	xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:task="http://www.springframework.org/schema/task"
 	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
 		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
 		http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
+		http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">
 
 	<!-- Root Context: defines shared resources visible to all other web components -->
 
 	<context:annotation-config />
 	<context:component-scan base-package="info.bukova.isspst,org.zkoss.spring.beans.zkcomponents"></context:component-scan>
 	
+	<task:annotation-driven/>
+
 	<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" id="propertyConfigurer">
 		<property name="locations">
 			<list>