关于.net发送EMAIL的总结

①导入相应的包：

using System.Web.Mail;
using System.Net.Mail;
using System.Net;

using System.Web.Mail;
using System.Net.Mail;
using System.Net;

②建立发送Email的方法：

/// <summary>
///  发送EMail
/// </summary>
/// <param name="title">标题</param>
/// <param name="body">内容</param>
/// <param name="toAdress">发送到哪</param>
/// <param name="fromAdress">从哪发送</param>
/// <param name="userName">用户名</param>
/// <param name="userPwd">密码</param>
/// <param name="smtpHost">smtp服务器</param>
private void sendMail(string title, string body, string toAdress, string fromAdress,
                                               string userName, string userPwd, string smtpHost)
{
    try
    {
        MailAddress to = new MailAddress(toAdress);
        MailAddress from = new MailAddress(fromAdress);
        System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(from, to);
        message.Subject = title; message.Body = body;
        SmtpClient smtp = new SmtpClient();
        smtp.UseDefaultCredentials = true;
        smtp.Port = 25;
        smtp.Credentials = new NetworkCredential(userName, userPwd);
        smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
        smtp.Host = smtpHost;
        message.To.Add(toAdress);
        smtp.Send(message);
    }
    catch (Exception ex) {
        Response.Write(ex.Message);
    }
}

    /// <summary>
    ///  发送EMail
    /// </summary>
    /// <param name="title">标题</param>
    /// <param name="body">内容</param>
    /// <param name="toAdress">发送到哪</param>
    /// <param name="fromAdress">从哪发送</param>
    /// <param name="userName">用户名</param>
    /// <param name="userPwd">密码</param>
    /// <param name="smtpHost">smtp服务器</param>
    private void sendMail(string title, string body, string toAdress, string fromAdress, 
                                                   string userName, string userPwd, string smtpHost)
    {
        try
        {
            MailAddress to = new MailAddress(toAdress);
            MailAddress from = new MailAddress(fromAdress);
            System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(from, to);
            message.Subject = title; message.Body = body;
            SmtpClient smtp = new SmtpClient();
            smtp.UseDefaultCredentials = true;
            smtp.Port = 25;
            smtp.Credentials = new NetworkCredential(userName, userPwd);
            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
            smtp.Host = smtpHost; 
            message.To.Add(toAdress);
            smtp.Send(message);
        }
        catch (Exception ex) {
            Response.Write(ex.Message);
        }
    }

③测试发送Email：

sendMail("�祟}", "�热�", "[email protected]", "[email protected]", "test", "123456", "smtp.126.com");

 sendMail("�祟}", "�热�", "[email protected]", "[email protected]", "test", "123456", "smtp.126.com");

注：有些邮件服务器的端口不是25,比如说Gmail，改一下相应的方法内容即可，另发现在本机能够测试通过。可是传到局域网里的另一台机器上发送失败，说什么“积极拒绝...”之类的，网上也有些方法说可以解决，但没亲自测试过....