C#实现SMTP邮件发送程序实例

通常来说邮件发送功能在网站应用程序中经常会用到，包括大家经常看到的博客，在添加评论后，系统会自动发送邮件通知到我邮箱的，把系统发送邮件的功能整理了下，本文展示了一个客户端Demo，希望对有需要的朋友有所帮助。运行效果如下图所示：

核心代码如下：

using System.Net;
using System.Net.Mail;
using System.Text;
namespace HC.Email
{
    /// <summary>
    ///     整站邮件服务类
    /// </summary>
    public class EmailService
    {
        /// <summary>
        ///     发送邮件
        /// </summary>
        /// <param name="mailTo">收件人
        /// <param name="subject">主题
        /// <param name="body">内容
        /// <returns></returns>
        public static bool Send(string mailTo, string subject, string body)
        {
            return Send(new[] {mailTo}, null, subject, body, true, null);
        }
        /// <summary>
        ///     发送邮件
        /// </summary>
        /// <param name="mailTo">收件人
        /// <param name="subject">主题
        /// <param name="body">内容
        /// <returns></returns>
        public static bool Send(string[] mailTo, string subject, string body)
        {
            return Send(mailTo, null, subject, body, true, null);
        }
 
        /// <summary>
        ///     发送邮件
        /// </summary>
        /// <param name="mailTo">收件人
        /// <param name="subject">主题
        /// <param name="body">内容
        /// <param name="attachmentsPath">附件
        /// <returns></returns>
        public static bool Send(string[] mailTo, string subject, string body, string[] attachmentsPath)
        {
            return Send(mailTo, null, subject, body, true, attachmentsPath);
        }
 
        /// <summary>
        ///     发送邮件
        /// </summary>
        /// <param name="mailTo">收件人
        /// <param name="mailCcArray">抄送
        /// <param name="subject">主题
        /// <param name="body">内容
        /// <param name="isBodyHtml">是否Html
        /// <param name="attachmentsPath">附件
        /// <returns></returns>
        public static bool Send(string[] mailTo, string[] mailCcArray, string subject,string body, bool isBodyHtml,
                                string[] attachmentsPath)
        {
            try
            {
                var config = ConfigHelper.GetConfig<emailconfig>();
                if (string.IsNullOrEmpty(config.Host) ||string.IsNullOrEmpty(config.UserName) ||
                    string.IsNullOrEmpty(config.Port) ||string.IsNullOrEmpty(config.Password))
                {
                    //todo:记录日志
                    return false;
                }
                var @from = new MailAddress(config.MailFrom); //使用指定的邮件地址初始化MailAddress实例
                var message = new MailMessage(); //初始化MailMessage实例
                //向收件人地址集合添加邮件地址
                if (mailTo != null)
                {
                    foreach (string t in mailTo)
                    {
                        message.To.Add(t);
                    }
                }
 
                //向抄送收件人地址集合添加邮件地址
                if (mailCcArray != null)