If you could try changing line 28 and 33 to be:

OP_HALFOPEN) || die(imap_last_error());

that should give enough information to be able to track down the problem better. (You don’t want to leave that in on a production system since who are legitimately rejected would get an unfriendly looking page). Let me know where you get with that.

Please, help me.
Thanks.

If (!$mbox) then the stream wasn’t successfully opened and doesn’t actually need to be closed.

So, as it is, the flow is:
if success on the primary server, close that connection
if not success on the primary server no connection was opened, try the alternate server, and close closes that connection.

That being said, your suggestion isn’t wrong, and, as-is, it may be trying to close a connection that wasn’t created on the alternate server. The existing flow could be made more clear by checking function return values.

Re: 2:

If you can login as an administrator, under the Admin control panel, Client Communication - Authentication there’s a drop down with the list to select Db authentication.

If you can’t login, the way to change it manually in the database is to edit auth_method in the table phpbb_config to be “db”. (e.g. run the SQL: UPDATE phpbb_config SET config_value=’db’ WHERE config_name=’auth_method’ LIMIT 1;). I don’t know if there’s an easier way if you can’t login.

Re: 3:

You’re welcome and thanks for commenting. Hope this helps.

if (!$mbox) {

// CLOSE HERE
imap_close($mbox);

// Give status about wrong password…
return array(… );

}

imap_close($mbox);

2/. After i config used IMAP then Err and I can’t login my forum. Howto re-config authentication by DB?

3/. Thanks yous share!