Re: Re: imap_open() on windows extremely slow?
| From: | Michael Sims | Date: | Wed, 08 Sep 2004 19:11:12 +0000 |
| Subject: | Re: Re: imap_open() on windows extremely slow? | ||
| References: | 1 2 3 4 5 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-196156@lists.php.net to get a copy of this message | ||
Michael Wallner wrote:
> Well, so here comes /the oddity/
>
> connecting from debian to windows/exchange ~0.5 seconds
> connecting from debian to debian/courier ~0.2 (assumed to be somewhere at 0.x seconds)
> connecting from windows to debian/courier ~5 seconds
> connecting from windows to windows/exchange ~0.5 seconds
>
> Half a second is what I'd expect and is acceptable, but
> 5 seconds seems to be more serious than an oddity...
Anytime I see something like this, I suspect that the server (in this
case, Courier IMAP) is attempting an ident lookup on the client, or is
attempting a reverse DNS lookup. I suspect the latter is more likely.
For kicks, try temporarily adding an entry for your windows client to
the /etc/hosts file on the Debian/Courier server. If that fixes the
problem then I would look for ways to disable reverse DNS lookups in
Courier. Just a thought...