Asp.net send email

String file = server. mappath ("email_test.txt ");

System. Web. Mail. mailmessage MEs = new system. Web. Mail. mailmessage ();

Mes. To = "Send email ";
Mes. From = "receiving email ";

Mailattachment = new mailattachment (File );

Mes. attachments. Add (mailattachment );
Mes. Fields. Add ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); // basic Permissions
Mes. Fields. Add ("http://schemas.microsoft.com/cdo/configuration/sendusername", "Mail Box Name ");
Mes. Fields. Add ("http://schemas.microsoft.com/cdo/configuration/sendpassword", "Send email password ");
Mes. bodyencoding = system. Text. encoding. utf8;

Mes. Body = "email body email content ";

// You can select the text rendering format below

Mes. bodyformat = mailformat. html;

Mes. Subject = "mail sending test ";

Smtpmail. smtpserver = "smtp.163.com ";
Smtpmail. Send (MES );

Response. Write ("sent successfully! ");

}
Catch (exception ex)
{
Response. Write (ex. Message );
}

// The following is an email sent by the POP3 protocol of the server.

Try
{

String file = server. mappath ("email_test.txt ");

Mailaddress from = new mailaddress ("zhengpengfei0791@163.com"); // instance a mail address
Mailaddress to = new mailaddress ("solomon_msn@live.cn"); // instance a mail receipt address

Mailmessage MEs = new mailmessage (from, );

Attachment myattachment = new attachment (file, system. net. Mime. mediatypenames. application. octet );

System. net. Mime. contentdisposition disposition = myattachment. contentdisposition;

Disposition. creationdate = system. Io. file. getcreationtime (File );
Disposition. modificationdate = system. Io. file. getlastwritetime (File );
Disposition. readdate = system. Io. file. getlastaccesstime (File );

Mes. attachments. Add (myattachment );
Mes. isbodyhtml = true;

Mes. Subject = "mail test ";
Mes. Subject = "email body email content

Smtpclient client = new smtpclient ();
Client. Host = request. userhostaddress;
Client. Port = 25;

Client. Credentials = new system. net. networkcredential ("toemail", "test ");

Client. Send (MES );

Response. Write ("email sent successfully! ");

}< br> catch (exception ex)
{< br> response. Write (ex. Message);
}