Could not access 'CDO.Message' object

  • Thread starter Thread starter Lars-Erik Aabech
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L

Lars-Erik Aabech

Have you set the static SmtpServer property of the SmtpMail class?

You probably have a virtual SMTP server on your local machine but not on the
other machines.
The SmtpServer property defaults to local, but you could set it to ie.
"mail.mycompany.com" and off you go :)

"Could not access 'CDO.Message' object" is a general error message from the
SmtpMail.send method - I've got it if an attachment isn't found, if the
SmtpServer isn't found, etc. etc.
This is definately something that should be addressed ;)

HTH,
Lars-Erik
 
Hi there,

I built a .NET windows service application, which uses
SystemWeb.Mail.SmtpMail class. On my development machine (XP OS) it runs
well.
When I install the application on other machine (Windows 2000 OS + .NET
Framework 1.1), it rises an exception: "Could not access 'CDO.Message'
object"

What is missing ?

TIA,
Sabin
 
Lars-Erik Aabech said:
Have you set the static SmtpServer property of the SmtpMail class?
Click to expand...

Is CDO also installed? Its not on all machines...
"Could not access 'CDO.Message' object" is a general error message from
the SmtpMail.send method - I've got it if an attachment isn't found, if
the SmtpServer isn't found, etc. etc.
This is definately something that should be addressed ;)
Click to expand...

Consider Indy. Not only does it implement much more of the protocol than
WebMail, but it gives very specific exceptions when there is a problem and
also does not require CDO. Its also free.

http://www.indyproject.org/

SMTP demo here:
http://www.atozed.com/indy/
 
Is CDO also installed? Its not on all machines...

how can you tell, by the way? (except if it works or not)
Or is that the same as having an smtp virtual server on iis? :P

Lars-Erik
 
Lars-Erik Aabech said:
how can you tell, by the way? (except if it works or not)
Click to expand...

Im not sure of any way to determine if its available or not other than try to
use it.
Or is that the same as having an smtp virtual server on iis? :P
Click to expand...

No. Thats something totally different.

With Indy you dont need CDO, and if you use the relay option you dont even
need an SMTP server. :)
 
Even more basic, is to check whether or not the SMTP Service is installed or
not under Add Remove Programs :-)
Doubt that the .Net Framework Mail functionality works without the service.

// Henrik
 
To get the exact error thrown when sending the email, you should loop
through the caught exception's inner exception. Looking at the inner
exceptions will give you a much better idea where the problem lies, eg
bad email address, could not find server, etc.

Cheers,

Paul
 
How should I ? I only use a .NET object. See below my code:

MailMessage oMail = new MailMessage();
SmtpMail.SmtpServer = ...
oMail.From = ...
oMail.To = ...
oMail.Subject = ...
oMail.Body = ...
oMail.BodyFormat = MailFormat.Html;
SmtpMail.Send(oMail);

Thanx,
Sabin
 
You need to register the cdo mail dll on the affected computer. that will
solve the problem
 
Try something like this...

try
{
SmtpMail.Send
}
catch (Exception e)
{
string errorMessage = "";
Exception curException = e;
while (curException != null)
{
//collect all innner exceptions
errorMessage += curException.Message + "\n";
curException = curException.InnerException;
}
//throw a new exception with errorMessage as it's message...
throw new Exception(errorMessage);
//or log it somewhere...
}

Cheers,

Paul
 
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