I was looking for a way to send reports from an web application and I found a lot of code on the net, but the new System.Net.Mail from .NET 2.0 doesn't work with Gmail... so I've searched more and found a lot of good stuff on CodeProject. So here it is the class that I write based on those articles, simple and easy. The only problem is that it can’t send attachments. If anywone knows a way to send attachments using Gmail please let me know.

public sealed class SmtpMailer
{
    private string senderAddress;
    private string senderName;
    private string server;
    private string userName;
    private string password;
    private bool enableAuth;
    private bool enableSsl;
    private int port;

    private string errorMsg;
    public string ErrorMsg
    {
        get { return this.errorMsg; }
    }

    /// <summary>
    /// For public SMTP servers with no authentication
    /// </summary>
    public SmtpMailer(string senderAddress, string senderName, string server)
        : this(senderAddress, senderName, server, null, null, false, false, 25)
    { }

    /// <summary>
    /// For secure SMTP servers with authentication and SSL
    /// </summary>
    public SmtpMailer(string senderAddress, string senderName, string server, 
        string userName, string password, bool enableAuth, bool enableSsl, int port)
    {
        this.senderAddress = senderAddress;
        this.senderName = senderName;
        this.server = server;
        this.userName = userName;
        this.password = password;
        this.enableAuth = enableAuth;
        this.enableSsl = enableSsl;
        this.port = port;
    }

    public bool Send(string toAddress, string subject, string body, bool isHtml)
    {
        try

        {
            MailMessage mailMsg = new MailMessage();

            mailMsg.To = toAddress;
            mailMsg.Headers.Add("From", string.Format("{0} <{1}>", senderName, senderAddress));
            mailMsg.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserver"] = server;
            mailMsg.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"] = port;
            mailMsg.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"] = 2;

            if (enableAuth)
            {
                mailMsg.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"] = 1;
                mailMsg.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"] = userName;
                mailMsg.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"] = password;
            }

            if (enableSsl)
            {
                mailMsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true");
            }

            if (isHtml)
            {
                mailMsg.BodyFormat = MailFormat.Html;
            }

            mailMsg.BodyEncoding = Encoding.UTF8;
            mailMsg.Subject = subject;
            mailMsg.Body = body;

            SmtpMail.SmtpServer = server;
            SmtpMail.Send(mailMsg);

            return true;
        }
        catch (Exception ex)
        {
            this.errorMsg = ex.Message;
            return false;
        }
    }
}