diff --git a/src/main/java/org/gcube/portal/socialmail/PeriodicTask.java b/src/main/java/org/gcube/portal/socialmail/PeriodicTask.java
index 6d736c7..5e3ace0 100644
--- a/src/main/java/org/gcube/portal/socialmail/PeriodicTask.java
+++ b/src/main/java/org/gcube/portal/socialmail/PeriodicTask.java
@@ -522,7 +522,7 @@ public class PeriodicTask implements Runnable {
 		String subAddressToReturn = null;
 		for (int i = 0; i < emails.length; i++) {
 			String toParse = emails[i].toString();
-			int plus = toParse.indexOf('+');
+			int plus = toParse.lastIndexOf('+');
 			int at = toParse.indexOf('@');
 			if (plus >= 0) {
 				subAddressToReturn =  toParse.substring(plus+1, at);