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Thanks for your suggestion.<br />
<br />
I use BT as my ISP and had some other problems at the time with emails and addresses.<br />
After some investigations by BT these seem to have vanished and I am not getting the error any more.
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Thanks for your suggestion.

I use BT as my ISP and had some other problems at the time with emails and addresses.
After some investigations by BT these seem to have vanished and I am not getting the error any more.

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I have a site <a href="http://www.boatsforsalenow.com" rel="ugc">www.boatsforsalenow.com</a>&nbsp;which allows free adverts for people wishing to sell their boat. This is a .asp website.<br />
<br />
When an advert is placed it sends a notification email to me.<br />
<br />
To day I received four such adverts but they were headed <br />
Send failed due to: Could not connect to host Original message follows:.<br />
<br />
I replied to two but the third caused a norton error box to open. Picture attached.<br />
<br />
I have since entered some test adverts but these all seem to work correctly.<br />
<br />
Can anyone say what may be happening?<br />
<br />
Many thanks<br />
<br />
John <a href="https://filedb.experts-exchange.com/incoming/2011/11_w47/522378/email.jpg" target="_blank" title="email errors (31 KB)"><img alt="email errors" class="file-block lazyload" style="max-width: 440px;" data-src="https://filedb.experts-exchange.com/incoming/2011/11_w47/522378/email.jpg" /></a>
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email.jpg

I have a site www.boatsforsalenow.com which allows free adverts for people wishing to sell their boat. This is a .asp website.

When an advert is placed it sends a notification email to me.

To day I received four such adverts but they were headed 
Send failed due to: Could not connect to host Original message follows:.

I replied to two but the third caused a norton error box to open. Picture attached.

I have since entered some test adverts but these all seem to work correctly.

Can anyone say what may be happening?

Many thanks

John 

Unable to connect to LPAD

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.

Microsoft IIS Web Server

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Active Server Pages (ASP) is Microsoft’s first server-side engine for dynamic web pages. ASP’s support of the Component Object Model (COM) enables it to access and use compiled libraries such as DLLs. It has been superseded by ASP.NET, but will be supported by Internet Information Services (IIS) through at least 2022.