diff --git a/pom.xml b/pom.xml
index ec12627..e7c7a4d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -70,6 +70,12 @@
 			<artifactId>httpclient5</artifactId>
 		</dependency>
 		
+		<dependency>
+			<groupId>javax.mail</groupId>
+			<artifactId>mail</artifactId>
+			<version>1.4.7</version>
+		</dependency>
+		
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
diff --git a/src/main/java/eu/dnetlib/apps/oai/service/CollectorService.java b/src/main/java/eu/dnetlib/apps/oai/service/CollectorService.java
index 4472798..6eba842 100644
--- a/src/main/java/eu/dnetlib/apps/oai/service/CollectorService.java
+++ b/src/main/java/eu/dnetlib/apps/oai/service/CollectorService.java
@@ -104,20 +104,21 @@ public class CollectorService {
 				info.setExecutionStatus(ExecutionStatus.COMPLETED);
 				info.setEnd(now);
 				info.setExpirationDate(now.plusHours(executionDuration));
-				emailSender.notifySuccess(info);
-			} catch (final Throwable e) {
-				info.setExecutionStatus(ExecutionStatus.FAILED);
-				info.setMessage(e.getMessage() + ": " + ExceptionUtils.getStackTrace(e));
-				info.setEnd(LocalDateTime.now());
-				emailSender.notifyFailure(info);
-			} finally {
-				sc.complete();
 
 				if (StringUtils.isNotBlank(publicBasePath)) {
 					info.setPublicUrl(publicBasePath + "/" + jobId);
 				}
 
+				emailSender.notifySuccess(info);
+			} catch (final Throwable e) {
+				info.setExecutionStatus(ExecutionStatus.FAILED);
+				info.setMessage(e.getMessage() + ": " + ExceptionUtils.getStackTrace(e));
+				info.setEnd(LocalDateTime.now());
+
+				emailSender.notifyFailure(info);
+			} finally {
 				collectionInfoRepository.save(info);
+				sc.complete();
 			}
 		});
 
@@ -210,7 +211,7 @@ public class CollectorService {
 	}
 
 	public static void cleanCollectedData(final String storageUrl) throws URISyntaxException {
-		log.info("[CLEAN] - Deleting: " + storageUrl);
+		log.info("[CLEAN] Deleting expired storage: " + storageUrl);
 
 		final URI uri = new URI(storageUrl);
 		final String protocol = uri.getScheme();
diff --git a/src/main/java/eu/dnetlib/apps/oai/utils/EmailSender.java b/src/main/java/eu/dnetlib/apps/oai/utils/EmailSender.java
index 9299743..43be7ee 100644
--- a/src/main/java/eu/dnetlib/apps/oai/utils/EmailSender.java
+++ b/src/main/java/eu/dnetlib/apps/oai/utils/EmailSender.java
@@ -1,6 +1,24 @@
 package eu.dnetlib.apps.oai.utils;
 
+import java.util.Date;
+import java.util.Properties;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import javax.annotation.PostConstruct;
+import javax.mail.Authenticator;
+import javax.mail.Message;
+import javax.mail.MessagingException;
+import javax.mail.PasswordAuthentication;
+import javax.mail.Session;
+import javax.mail.Transport;
+import javax.mail.internet.InternetAddress;
+import javax.mail.internet.MimeMessage;
+
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 
 import eu.dnetlib.apps.oai.model.CollectionInfo;
@@ -8,6 +26,50 @@ import eu.dnetlib.apps.oai.model.CollectionInfo;
 @Service
 public class EmailSender {
 
+	private static final Log log = LogFactory.getLog(EmailSender.class);
+
+	private final BlockingQueue<Message> queue = new LinkedBlockingQueue<>();
+
+	@Value("${oai.conf.notification.sender.name}")
+	private String fromName;
+
+	@Value("${oai.conf.notification.sender.email}")
+	private String fromEmail;
+
+	@Value("${oai.conf.notification.smtp.host}")
+	private String smtpHost;
+
+	@Value("${oai.conf.notification.smtp.host}")
+	private long smtpPort;
+
+	@Value("${oai.conf.notification.smtp.user}")
+	private String smtpUser;
+
+	@Value("${oai.conf.notification.smtp.password}")
+	private String smtpPassword;
+
+	@PostConstruct
+	private void init() {
+		new Thread(() -> {
+			while (true) {
+				try {
+					final Message message = this.queue.take();
+					if (message != null) {
+						try {
+							log.info("Sending mail...");
+							Transport.send(message);
+							log.info("...sent");
+						} catch (final MessagingException e) {
+							log.error("Error sending email", e);
+						}
+					}
+				} catch (final InterruptedException e1) {
+					throw new RuntimeException(e1);
+				}
+			}
+		}).start();
+	}
+
 	public void notifySuccess(final CollectionInfo info) {
 		if (StringUtils.isNotBlank(info.getNotificationEmail())) {
 			sendMail(info.getNotificationEmail(), "OAI Harvesting completed", prepareSuccessMessage(info));
@@ -30,8 +92,48 @@ public class EmailSender {
 		return null;
 	}
 
-	private void sendMail(final String to, final String subject, final String message) {
-		// TODO Auto-generated method stub
+	public void sendMail(final String to, final String subject, final String message) {
+		try {
+			final Session session = Session.getInstance(obtainProperties(), obtainAuthenticator());
 
+			final MimeMessage mimeMessage = new MimeMessage(session);
+			mimeMessage.setFrom(new InternetAddress(fromEmail, fromName));
+			mimeMessage.setSubject(subject);
+			mimeMessage.setContent(message, "text/html; charset=utf-8");
+			mimeMessage.setSentDate(new Date());
+
+			mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
+
+			this.queue.add(mimeMessage);
+
+			log.info("Mail to " + to + " in queue");
+		} catch (final Exception e) {
+			log.error("Error sending mail", e);
+		}
 	}
+
+	private Properties obtainProperties() {
+		final Properties p = new Properties();
+		p.put("mail.transport.protocol", "smtp");
+		p.put("mail.smtp.host", smtpHost);
+		p.put("mail.smtp.port", smtpPort);
+		p.put("mail.smtp.auth", Boolean.toString(StringUtils.isNotBlank(smtpUser)));
+		return p;
+	}
+
+	private Authenticator obtainAuthenticator() {
+		if (StringUtils.isBlank(smtpUser)) { return null; }
+
+		return new Authenticator() {
+
+			private final PasswordAuthentication authentication = new PasswordAuthentication(smtpUser, smtpPassword);
+
+			@Override
+			protected PasswordAuthentication getPasswordAuthentication() {
+				return authentication;
+			}
+
+		};
+	}
+
 }
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 2ca1e0f..d1a2a15 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -27,4 +27,10 @@ oai.conf.maxRecords = 1000
 
 oai.conf.enable.export.api = true
 
+oai.conf.notification.sender.name   = OAI Collector Service
+oai.conf.notification.sender.email  = noreply@openaire.eu
+oai.conf.notification.smtp.host     = localhost
+oai.conf.notification.smtp.host     = 587
+oai.conf.notification.smtp.user     =
+oai.conf.notification.smtp.password =