Sending email from EPiServer

public static void SendEmail(string subject, string message, 
        string from, string to, bool isHtml)
{
  MailMessage mail = new MailMessage();
  mail.From = new MailAddress(from);

  mail.To.Add(to);
  mail.Subject = subject;
  mail.Body = message;
  mail.IsBodyHtml = isHtml;

  SmtpClient smtp = GetConfiguredSmtpClient();
  smtp.Send(mail);
}

GetConfiguredSmtpClient below comes from the EPiServer sample templates.

public static SmtpClient GetConfiguredSmtpClient(string smtpServer, 
        int smtpPort, string userName, string password)
{
    SmtpClient smtp = new SmtpClient();

    // Setup the host and port
    const int DefaultSmtpPort = 25;

    if (smtpPort == -1)
        smtpPort = (int)EPiServer.Global.EPConfig["EPnSmtpServerPort"];

    if (smtpPort < 1 || smtpPort > 65535)
        smtpPort = DefaultSmtpPort;

    if (smtpPort != DefaultSmtpPort)
    {
        smtp.Port = smtpPort;
    }

    if (smtpServer == null)
        smtpServer = (string)EPiServer.Global.EPConfig["EPsSmtpServer"];

    if (smtpServer.Length > 0)
    {
        smtp.Host = smtpServer;
    }

    // Setup the smtp authentication
    if (userName == null)
        userName = (string)EPiServer.Global.EPConfig["EPsSmtpUser"];

    if (password == null)
        password = (string)EPiServer.Global.EPConfig["EPsSmtpPassword"];

    // User/password may both be empty -- in that case just ignore everything... 
    if (userName.Length != 0 || password.Length != 0)
    {
        // If one has been defined, the other must also be defined
        if (userName.Length == 0)
            throw new EPiServerException("Undefined username");
        if (password.Length == 0)
            throw new EPiServerException("Undefined password");

        smtp.Credentials = new NetworkCredential(userName, password);
    }

    return smtp;
}