SMTP using. Net to send emails (simple version)

This article mainly discusses using the mailmessage and smtpmail classes in the system. Web. Mail namespace to simply implement the mail sending function.

Procedure andCodeAs follows: (the example is implemented using winform)

1. Add the reference to the project -->. Net --> Find system. Web. dll, OK, and add it.

2. Add the using code:UsingSystem. Web. mail;

3. Write the core sending code: Private   Void Sendmail ( String Server, String From, String To, String Subject, String Body, String Username, String Password)
{
Try
{
Mailmessage mail =   New Mailmessage ();
Mail. From = From;
Mail. = To;
Mail. Subject = Subject;
Mail. Body = Body;
Mail. bodyformat = Mailformat. html;
Mail. Fields. Add ( " Http://schemas.microsoft.com/cdo/configuration/smtpauthenticate " , " 1 " );
Mail. Fields. Add ( " Http://schemas.microsoft.com/cdo/configuration/sendusername " , Username );
Mail. Fields. Add ( " Http://schemas.microsoft.com/cdo/configuration/sendpassword " , Password );

Smtpmail. smtpserver = Server;
Smtpmail. Send (Mail );
}
Catch (Exception ex)
{
MessageBox. Show (ex. Message+Ex. innerexception. Message );
}
}

Note that the Sendmail method has the following three sentences: Mail. Fields. Add ( " Http://schemas.microsoft.com/cdo/configuration/smtpauthenticate " , " 1 " );
Mail. Fields. Add ( " Http://schemas.microsoft.com/cdo/configuration/sendusername " , Username );
Mail. Fields. Add ( " Http://schemas.microsoft.com/cdo/configuration/sendpassword " , Password );

Verification information. If no information is written or the user name and password are incorrect, a prompt is displayed.
"Failed to access the CDO. Message object"
This is the most common error on the Internet. You can set a breakpoint to capture the error point and check the cause.
Here are several solutions to common CDO errors:
Jun. Net: http://blog.joycode.com/ghj/archive/2004/10/22/36274.aspx
Systemwebmail: http://www.systemwebmail.com/faq/4.2.3.aspx

4. You can call this method as needed. Remember to input the appropriate parameters.