Ran SMTP test from mxtoolbox and that checked out:
RESULT: mail.horrocks.com
Banner: Ready [94 ms]
Connect Time: 0.078 seconds - Good
Transaction Time: 0.578 seconds - Good
Relay Check: OK - This server is not an open relay.
Rev DNS Check: OK - 67.42.31.2 resolves to
67-42-31-2.slkc.qwest.net
GeoCode Info: Geocoding server is unavailable
Session Transcript: HELO mxtoolbox.com - DIAGNOSTIC TEST -
See
http://www.mxtoolbox.com/Policy.aspx
250 horrocks.com Ok [78 ms]
HELO mxtoolbox.com
250 horrocks.com Ok [78 ms]
MAIL FROM: <(E-Mail Removed)>
250 Ok [94 ms]
RCPT TO: <(E-Mail Removed)>
550 Relaying denied [78 ms]
QUIT
221 horrocks.com Closing transmission channel [78
ms]
--
Jane, not plain

64 bit enabled :-)
Batteries not included. Braincell on vacation ;-)
MVP Windows Shell/User
"Paul Smith" <(E-Mail Removed)> wrote in message
news:F5FCB35A-0EC6-4B25-AE9F-(E-Mail Removed)...
> It also isn't working from Windows Server 2008.
>
> --
> Paul Smith,
> Yeovil, UK.
> Microsoft MVP Windows Shell/User.
> http://www.dasmirnov.net/blog/
> http://www.windowsresource.net/
>
> *Remove nospam. to reply by e-mail*
>
>
> "Paul Smith" <(E-Mail Removed)> wrote in message
> news:21D81F24-639C-4D78-A32C-(E-Mail Removed)...
>> "MikeD" <(E-Mail Removed)> wrote in message
>> news:36145D87-4921-4BB1-B389-(E-Mail Removed)...
>>> My employer has a website we can log into to check our email remotely.
>>> When
>>> using WinXP SP2 at home (not my comp, my son's) I type in the url and it
>>> brings up a security certificate problem and then I can say continue to
>>> website and it brings up the login screen.
>>>
>>> I cannot get to this point on my Vista home machine or Vista laptop. Our
>>> IT
>>> people only support XP and are not willing to help out.
>>>
>>> I turned off everything I could think of including firewall, defender,
>>> pop-up blocker, etc. Basically everything I could find. Still, IE will
>>> not
>>> bring up the login screen or even the window that says the website has a
>>> problem with it's security certficate. The website is mail.horrocks.com.
>>>
>>> I guess I'm starting to get really annoyed with some of these issues.
>>> I've
>>> already turned off User Account Control because of it's non-stop
>>> nagging.
>>>
>>> I have Vista Home Premium and is currently updated with Windows Update.
>>>
>>> Any help that can be provided for this issue would be appreciated.
>>> Thanks.
>>
>> I'm seeing the same behavior here, I don't believe this is any sort of
>> security issue locally on your machine. It seems more like the server
>> simply isn't responding to the request, otherwise it would actually
>> connect.
>>
>> I'll try a few other things and post back.
>>
>> --
>> Paul Smith,
>> Yeovil, UK.
>> Microsoft MVP Windows Shell/User.
>> http://www.dasmirnov.net/blog/
>> http://www.windowsresource.net/
>>
>> *Remove nospam. to reply by e-mail*
>>
>>
>