[imp] Occasional login failures

[Carlton Thomas]

Hi,

This seems to be similar to problems we experienced when
using IMP against our POP server. No one was able to offer any
assistance to resolve the problem, but I did post a message to the
list with details of how we managed to overcome the problem. In short,
we had to modify the PHP source to implement retries whenever IMP tried
to authenticate against the POP server. If your problem is the same as
ours, then you will see two entries in the POP server log. The first
entry will show a successful authentication and the second entry will
show a failure to authenticate. However, the failure only occurs if
the second authentication attempt takes place while the POP server is
still busy servicing the first attempt, ie. while the mailbox is locked.
We also noticed that the number of authentication failures increased as
the size of the mailboxes increased and when the load on the mailserver
increased.

One thing to check, is whether you encounter the same authentication
problems when you use the IMP demonstration program on the Horde site
to access one of the problem mailboxes. When we tried that, we had the
same authentication problems as we did from a local copy of IMP.

One other thing to add is that we are using the QPopper POP3 server.
I wonder whether the way QPopper handles large mailboxes is the source
of the problem. Which POP3 server are you using?

Regards !

--
Carlton
=============================
GIFFORD INTERNET SERVICES
Bristol, United Kingdom 
Tel: 0845 111 0032
Tel: 0117 939 7722
Fax: 0845 111 0033
Email: admin@gifford.co.uk
Web: http://www.gifford.co.uk
=============================


On Fri, 14 Jun 2002 t.nguyen@unimelb.edu.au wrote:

> Hi Jan
> 
> Every entry for a failed login is preceeded be a success entry:
> 
> Jun 14 15:58:05 HORDE [notice] [imp] Login success for thu [128.250.xx.x] to 
> {mailserver.mysubnet.unimelb.edu.au:110} [on line 51 of 
> "/usr5/kle/horde-2.0/imp/redirect.php"]
> Jun 14 15:58:15 HORDE [error] [imp] FAILED LOGIN 128.250.xx.x to 
> mailserver.mysubnet.unimelb.edu.au:110[pop3] as thu [on line 332 of 
> "/usr5/kle/horde-2.0/imp/lib/IMP.php"]
> 
> I have the feeling my Auth is confused between the horde and imp, but I have 
> followed instruction to have imp to do Auth.  I have nothing else in horde for 
> the moment, only IMP