C# code for sending mail automatically through application code.

You can generally find this kind of programming requirements in automated mail response system like websites for online booking for booking confirmation mail. This is very basic piece of code. For enterprise level requirement you can use MS SQL server 2008 which has functionality for the same available.

These namespaces are to added to the code.

using System.Net.Mail;

using System.Net;

The following lines of code shows how the mail message is generated and finally send using SMTP.

MailMessage mM = new MailMessage();

//Mail Address

mM.From = new MailAddress("sender@hotmail.com ");

//receiver email id

mM.To.Add("receiver@hotmail.com ");

//subject of the email

mM.Subject = “subject string”;

//attachment

mM.Attachments.Add(new Attachment(@"local path"));

//body of the email

mM.Body = “email body”;

mM.IsBodyHtml = true;

//SMTP client

SmtpClient sC = new SmtpClient("smtp.live.com");

//port number for Hot mail

sC.Port = 25;

//credentials to login in to hotmail account

sC.Credentials = new NetworkCredential("sender@hotmail.com", "password");

//enabled SSL

sC.EnableSsl = true;

//Send an email

sC.Send(mM);

Send an E-Mail Given the SMTP Address of an Account

//Namespaces to use

using Outlook = Microsoft.Office.Interop.Outlook;

using System;
using System.Text;
using Outlook = Microsoft.Office.Interop.Outlook;

// code to send mail
namespace OutlookAddIn1
{
    class Sample
    {
        public static void SendEmailFromAccount(Outlook.Application application, string subject, string body, string to, string smtpAddress)
        {

            // Create a new MailItem and set the To, Subject, and Body properties.
            Outlook.MailItem newMail = (Outlook.MailItem)application.CreateItem(Outlook.OlItemType.olMailItem);
            newMail.To = to;
            newMail.Subject = subject;
            newMail.Body = body;

            // Retrieve the account that has the specific SMTP address.
            Outlook.Account account = GetAccountForEmailAddress(application, smtpAddress);
            // Use this account to send the e-mail.
            newMail.SendUsingAccount = account;
            newMail.Send();
        }


        public static Outlook.Account GetAccountForEmailAddress(Outlook.Application application, string smtpAddress)
        {

            // Loop over the Accounts collection of the current Outlook session.
            Outlook.Accounts accounts = application.Session.Accounts;
            foreach (Outlook.Account account in accounts)
            {
                // When the e-mail address matches, return the account.
                if (account.SmtpAddress == smtpAddress)
                {
                    return account;
                }
            }
            throw new System.Exception(string.Format("No Account with SmtpAddress: {0} exists!", smtpAddress));
        }

    }
}

SmtpMail and Mail Message

using System.Web.Util 
sendmail()
{
            MailMessage mailMsg = new MailMessage();
            mailMsg .From = "from@fromServer.com";
            mailMsg .To = "to@toServer.com";
            mailMsg .Cc = "cc@ccServer.com"";
            mailMsg .Bcc = "bcc@bccServer.com";
            mailMsg .Subject = "SubjectOfTheMailString";
            mailMsg .Body = "BodyOfTheMailString";
            SmtpMail.Send(mailMsg ); 
}