Ø       Sending a Simple Mail

Ø       Sending Mail with Attachment

Ø       Sending Mail with HTML body

Ø       Sending Email with Embedded Image in the Message Body

Ø       Sending Email with Gmail SMTP Server from ASP.Net

Sending a Simple Mail

MailMessage mail = new MailMessage();

mail.To.Add("to@gmail.com");

mail.From = new MailAddress("from@gmail.com");

mail.Subject = "Test Email";

string Body = "Welcome to CodeDigest.Com!!";

mail.Body = Body;

SmtpClient smtp = new SmtpClient();

smtp.Host = ConfigurationManager.AppSettings["SMTP"];

smtp.Send(mail);

The above code can be used to send a simple email.

Sending Mail with Attachment

We can also send email with attachments. The below code will help you to achieve it.

MailMessage mail = new MailMessage();

mail.To.Add("to@gmail.com");

mail.From = new MailAddress("From@gmail.com");

mail.Subject = "Test Email";

string Body = "Welcome to CodeDigest.Com!!";

mail.Body = Body;

mail.Attachments.Add(new Attachment(@"F:\Articles\Email in ASP.Net 2.0\SendEmail\mail.png"));

SmtpClient smtp = new SmtpClient();

smtp.Host = ConfigurationManager.AppSettings["SMTP"];

smtp.Send(mail);

Sending Mail with HTML Body

Sometimes, we will have requirements to send email as a HTML body. The below code will help you to achieve the same.

MailMessage mail = new MailMessage();

mail.To.Add("to@gmail.com");

mail.From = new MailAddress("From@gmail.com");

mail.Subject = "Test Email";

string Body = "Welcome to CodeDigest.Com!!";

mail.Body = Body;

mail.IsBodyHtml = true;

SmtpClient smtp = new SmtpClient();

smtp.Host = ConfigurationManager.AppSettings["SMTP"];

smtp.Send(mail);

We may also have requirements to send email with an embedded image in the message body. This was made easy with ASP.Net 2.0 with the help 2 new classes that are packed in .Netframework 2.0. Next section will help us understand the same.

Sending Email with Embedded Image in the Message Body

We can embed image in the email body using LinkedResource class and AlternateView class that is packed with System.Net.Mail namespace and by making the message body as HTML.

How to achieve this?

 We have to include a <IMG> with a contentid specified in src attribute of <IMG> tag in the message body, i.e. the HTML body should contain <img src="cid:imageId" />.

Example will be,

<b>View my Pic</b><br>

<img src="cid:Anyid" />

We need to give the same contentid to the ContentId attribute of LinkedResource object for the code to work.

Implementation

try

        {

            MailMessage mail = new MailMessage();

            mail.To.Add("to@gmail.com");

            mail.From = new MailAddress("from@gmail.com");

            mail.Subject = "Test with Image";

            string Body = <b>Welcome to codedigest.com!!</b><br><BR>Online resource for .net articles.<BR><img alt=\"\" hspace=0 src=\"cid:imageId\" align=baseline border=0 >";

            AlternateView htmlView = AlternateView.CreateAlternateViewFromString(Body, null, "text/html");

            LinkedResource imagelink = new LinkedResource(Server.MapPath(".") + @"\codedigest.png", "image/png");

            imagelink.ContentId = "imageId";

            imagelink.TransferEncoding = System.Net.Mime.TransferEncoding.Base64;

            htmlView.LinkedResources.Add(imagelink);

            mail.AlternateViews.Add(htmlView);

            SmtpClient smtp = new SmtpClient();

            smtp.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;

            smtp.Send(mail);

        }

        catch (Exception ex)

        {

            Response.Write(ex.Message);

        }

OUTPUT

Sending Email with Gmail SMTP Server from ASP.Net

To send email using gmail SMTP server you will require a valid gmail userid and password. If you didn’t specify a valid gmail userid and password then you will get the following error.

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.

The below code can be used to send email using gmail SMTP server, smtp.gmail.com.

MailMessage mail = new MailMessage();

mail.To.Add("to@gmail.com");

mail.From = new MailAddress("from@gmail.com");

mail.Subject = "Test Email";

string Body = "<b>Welcome to CodeDigest.Com!!</b>";

mail.Body = Body;

mail.IsBodyHtml = true;

SmtpClient smtp = new SmtpClient();

smtp.Host = ConfigurationManager.AppSettings["SMTP"];

smtp.Credentials = new System.Net.NetworkCredential(ConfigurationManager.AppSettings["FROMEMAIL"], ConfigurationManager.AppSettings["FROMPWD"]);

smtp.EnableSsl = true;   

smtp.Send(mail);

Web.Config

<appSettings>

    <add key="SMTP" value="smtp.gmail.com"/>

    <add key="FROMEMAIL" value="mail@gmail.com"/>

    <add key="FROMPWD" value="password"/>

  </appSettings>