[Dshield] Need some help please

Aaron Lewis aaron at adldatacomm.net
Thu Mar 3 03:29:18 GMT 2005

I did look at this. There causes as listed are

. Incorrect account settings
. Misconfiguration of personal firewall software
. Antivirus software
. A bad modem
. Maximum Transmission Unit (MTU) size
. Outlook Express has been removed from the computer or the installation is
. Your user profile in Outlook is damaged
. An e-mail item on your POP3 server is damaged

All of which are ruled out by the fact that I can reproduce the error at
will on 3 different LAN's 2 different OS's some with and some without
firewalls. And I can also reproduce the error with no virus software
installed. I've been testing this crap for 3 days straight.

Server is QMail.

-----Original Message-----
From: list-bounces at lists.dshield.org
[mailto:list-bounces at lists.dshield.org]On Behalf Of Rick Klinge
Sent: Wednesday, March 02, 2005 7:40 PM
To: 'General DShield Discussion List'
Subject: RE: [Dshield] Need some help please

> "Aaron Lewis" <aaron at adldatacomm.net> writes:
> > Hello, I have a problem that I can't put my finger on. I
> have a client
> > who uses my mail server qMail on Linux with HSphere. The
> mail client
> > giving us trouble is Outlook Express. All systems are Virus and
> > Spyware free. Verified as recently as this morning.
> >
> > Here's the problem. Some times when they try to send mail with an
> > attachment, it fails with error 0x800CCC0F Your server has
> > unexpectedly terminated the connection. Possible causes for this
> > include server problems, network problems, or a long period of
> > inactivity. Account: 'your.mail.account', Server:
> 'your.mail.server',
> > Protocol: POP3, Port: 110, Secure(SSL): No, Error Number: 0x800CCC0F
> >
> > Now I can reproduce this on Windows 2000 and XP on 3
> different LAN's
> > using 3 different ISP's. This is a recent issue within the
> last month.
> > I have a capture of a failed message that I don't want to
> post to the
> > forum. If you'd like to take a look please ask.
> >
> > If you need information I have not provided please ask for
> that also.
> What POP3 server are you using? Are you sure it supports SSL
> on port 110/tcp? - some use the alternate POP3S port
> (995/tcp).  What certificate does it have? Some clients, esp.
> Windows ones will reject self-signed (homebrew) certs,
> instead wanting one which is signed by one of the big CAs.
> cheers,
>  Jamie

Have you checked:



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