At some point in the past, this was working, but our wiki is now not sending email to the WikiSysop when someone makes a change to the wiki.
We have both $wgEnableEmail and $wgEnableUserEmail set to "true", and the EmailNotification variables are:
$wgEnotifUserTalk = true; # UPO
$wgEnotifWatchlist = true; # UPO
$wgEmailAuthentication = true;
$wgUsersNotifiedOnAllChanges = array('WikiSysop');
As I say, at one point we know this was working, but it has stopped and I can't figure out why. The wiki is configured to use the php mail functionality (not a direct SMTP connection), which is working for other applications on our server.
I know that the version of the wiki software is somewhat old, but I haven't seen anything in the release note of subsequent versions that says a fix for anything that seems to be conencted to this issue was implemented. There doesn't seem to be a way to get the MediaWiki software to log what it is doing, to be able to check where in the process something is failing.
PHP: 5.4.11 (apache2handler)
Any help is appreciated, thanks!