Thread:Project talk:Support desk/$wgSMTP issue

I am trying to use  setting in LocalSettings.php of our company's intranet mediawiki installation.

$wgEnableEmail= true; $wgSMTP = array ( `host` => “ XXXX ”, `IDhost` => “YYYY”, `port` => “25”, `auth` = > false, `username` => “”, `password` => “”);

XXXX and YYYY are indicative. We have provided our SMTP server details. As far as I remember, such used to work untill few months ago. I mean users used to get email in case they request for password, or email address confirmation, watchlist emails. But suddenly this has stopped working. We get following traces Error sending mail: Group name did not validate.

I am not able to figure out what is wrong in settings. Is it something to with username, password? Infact I am not providing any username or password. And it used to work in past.