diff --git a/src/main/java/eu/dnetlib/uoaadmintoolslibrary/emailSender/EmailSender.java b/src/main/java/eu/dnetlib/uoaadmintoolslibrary/emailSender/EmailSender.java
index 6d5e9a4..87d326b 100644
--- a/src/main/java/eu/dnetlib/uoaadmintoolslibrary/emailSender/EmailSender.java
+++ b/src/main/java/eu/dnetlib/uoaadmintoolslibrary/emailSender/EmailSender.java
@@ -30,6 +30,9 @@ public class EmailSender {
         properties.put("mail.smtp.port", mailConfig.getPort());
         properties.put("mail.smtp.auth", mailConfig.getAuth()); //enable authentication
         properties.put("mail.smtp.starttls.enable", "true");
+        if(mailConfig.getHost().equals("smtp.gmail.com")) {
+            properties.put("mail.smtp.ssl.protocols", "TLSv1.2");
+        }
         logger.debug("Try to connect to mail sender with "+ mailConfig.getUsername());
         Session session = Session.getInstance(properties,
                 new javax.mail.Authenticator() {