[thelist] SMTP/CDONTS trouble

[Michael Juarez]

Thanks.

Turns out there was a problem allowing traffic through the firewall. In
order for someone to send email via the Webserver, the firwall needs to
allow outbound traffic through the port the SMTP server uses, otherwise,
email messages cannot be relayed by the server.

There is a security issue here, however, as the SMTP server is now open
to be used as a relay point for any external server, and the firwall is
open for traffic on the SMTP port. The gap can be closed by placing
relay restrictions on the virtual SMTP server to allow hosts within a
certain IP range to relay messages, thereby preventing spammers from
piggybacking on your own server. Those of you out there setting up stuff
like this might want to take into consideration...

MJ

-----Original Message-----
From: spinhead [mailto:evolt at spinhead.com]
Sent: Friday, November 09, 2001 6:03 PM
To: thelist at lists.evolt.org
Subject: Re: [thelist] SMTP/CDONTS trouble


A few thoughts:
Does it fail consistently, or occasionally? These notes assume
consistently.

Is this internet, or intranet?

Are the permissions on the mailroot folder correct? Compare them to the
working machine.
In the IIS console, for the default SMTP Properties, check the
'Security'
tab. Do IUSR_machinename and IWAM_machinename (don't remember for
certain
this one's necessary) have operator permission?
Click the 'Delivery' tab, then the 'Advanced' button. Under
'Fully-qualified
domain name:' do you have the machine name, or machinename.domain.com?
Is antivirus software on the machine? It can kill CDONTS mail and you'll
never know what happened.

spinhead


----- Original Message -----
From: "Michael Juarez" <mjuarez at telseon.com>
To: <thelist at lists.evolt.org>
Sent: Friday, November 09, 2001 2:15 PM
Subject: [thelist] SMTP/CDONTS trouble


> Hi,
>
> Wondering if anyone can help me with my SMTP/CDONTS trouble. Here's
the
> problem:
>
> I have a new Win2K server, with virtual SMTP server installed,
standard
> stuff. Although my CDONTS script processes requests, the SMTP server
> seems unable to relay messages. Instead, messages are kept in the
Queue
> folder of the mailroot directory. Looking in the Badmail directory, I
> find the following error:
>
> Unable to deliver this message because the follow error was
encountered:
> "Error is processing file in pickup directory.".
>
> The specific error code was 0xC00402CE
>
> I assume there are some configuration problems with respect to the
> virtual SMTP server, and not a CDONTS script problem. I should note
that
> the CDONTS script works fine on my development server, which runs the
> same OS as the one giving me trouble.
>
> Any ideas?
>
> MJ
>
>
>
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