fixed bug when + is in the name of the Email Sender (Gateway)

git-svn-id: http://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portal/social-mail-servlet@142361 82a268e6-3cf1-43bd-a215-b396298e98cf

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);