Sending email by using C#

[Jason Zhou]

Hi,

I am new here, hope my question is not too stupid.

I want to send out email from my application by using C#, I was told to use
smtp, the sample code is very simple, I am using smtpmail.send(), the
questions are:

1. What does the relationship between smtp and pop3?
2. I had impression that I need account and password for smtp, how come I
don't need to specify in smtpmail object (and no method or property to let
me specify)?
3. I am keeping getting an error message like 'Could not access
'CDO.message' object', is it because the smtp is not available?

Thanks in advance!

Jason

 

[Scott Allen]

Hi Jason:

1) In a nutshell, use SMTP to send mail, use POP3 to retrieve mail.

2) SMTP generally does not involve a username or password, although
some situations do require credentials. Often times an SMTP server
will rely on other information, such as a recent POP3 login or a
specific IP address to authenticate. (See the URL in #3 if you need to
pass a username and password).

3) http://www.systemwebmail.com/default.aspx has plenty of
troubleshooting information.

HTH,

 

[Morten Wennevik]

Hi Jason,

If you use localhost as smtp server you would not need a username or password. But unless you also installed the smtp service in iis you will get a CDO error each time you try to use it.

Happy coding!
Morten Wennevik [C# MVP]

 

[Jason Zhou]

Scott,

Thanks for the information and quick response!

Jason

 

[Jason Zhou]

Morten,

Yeah I need to change something in my smtp service property, thanks for the
information!

Jason

Hi Jason,

If you use localhost as smtp server you would not need a username or

password. But unless you also installed the smtp service in iis you will
get a CDO error each time you try to use it.

Happy coding!
Morten Wennevik [C# MVP]