How to send emails using Gmail in C# and ASP.NET

Sending emails in your .NET applications requires right SMTP server configuration (it is Gmail in my case). I will use my Gmail address and password to succeed it.

First of all, you need to import corresponding libraries on the top of your code:

using System.Net.Mail;
using System.Net.Mime;
using System.Net;

Then, use the code below by optimizing it as you wish how it is sent through your app.

// Email object
MailMessage mMailMessage = new MailMessage();

// Sender address
mMailMessage.From = new MailAddress("yoursender@gmail.com");

// Recepient address
mMailMessage.To.Add(new MailAddress("yourrecepient@gmail.com"));

// Bcc address
mMailMessage.Bcc.Add(new MailAddress("bccaddress123@gmail.com"));

// CC address
mMailMessage.CC.Add(new MailAddress("ccaddress123@gmail.com"));

// Subject
mMailMessage.Subject = "Test subject";

// Body
mMailMessage.Body = "Test message comes here<br><b>It supports HTML</b>";

string file = "C:\\testfile.xlsx";

// Create the file attachment for this e-mail message.
Attachment data = new Attachment(file, MediaTypeNames.Application.Octet);

// Add time stamp information for the file.
ContentDisposition disposition = data.ContentDisposition;
disposition.CreationDate = System.IO.File.GetCreationTime(file);
disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
disposition.ReadDate = System.IO.File.GetLastAccessTime(file);

// Add the file attachment to this e-mail message.
mMailMessage.Attachments.Add(data);

// Format of the mail message body
mMailMessage.IsBodyHtml = true;

// Priority
mMailMessage.Priority = MailPriority.Normal;

// Instantiate a new instance of SmtpClient
SmtpClient mSmtpClient = new SmtpClient("smtp.gmail.com", 587)
{
    Credentials = new NetworkCredential("yoursender@gmail.com", "yourpassword"),
    EnableSsl = true,
    // UseDefaultCredentials = true
};

// Send the mail message
mSmtpClient.Send(mMailMessage);

It will show up like this: