public class GmailEmailService:SmtpClient
{
    // Gmail user-name
    public string UserName { get; set; }

    public GmailEmailService() :
        base(ConfigurationManager.AppSettings["GmailHost"], Int32.Parse(ConfigurationManager.AppSettings["GmailPort"]))
    {
        //Get values from web.config file:
        this.UserName = ConfigurationManager.AppSettings["GmailUserName"];
        this.EnableSsl = Boolean.Parse(ConfigurationManager.AppSettings["GmailSsl"]);
        this.UseDefaultCredentials = false;
        this.Credentials = new System.Net.NetworkCredential(this.UserName, ConfigurationManager.AppSettings["GmailPassword"]);
    }
}

public async Task SendAsync(IdentityMessage message)
{
    MailMessage email = new MailMessage(new MailAddress("youremailadress@domain.com", "(any subject here)"),
    new MailAddress(message.Destination));
    email.Subject = message.Subject;
    email.Body = message.Body;

    email.IsBodyHtml = true;

    GmailEmailService mailClient = new GmailEmailService();
    await mailClient.SendMailAsync(email);
}

<appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />

    <add key="GmailUserName" value="youremail@yourdomain.com"/>
    <add key="GmailPassword" value="yourPassword"/>
    <add key="GmailHost" value="yourServer"/>
    <add key="GmailPort" value="yourPort"/>
    <add key="GmailSsl" value="chooseTrueOrFalse"/>
    <!--Smptp Server (confirmations emails)-->
</appSettings>