邮件客户端开发

.Net自带封装的Mail接口（System.Net.Mail）

方法实现

 static readonly string cc = ConfigurationManager.AppSettings["cc"];
        //app.config使用如下注释的代买读取配置，web.config使用6行代码读取配置
        //static Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
        //static SmtpSection smtp = NetSectionGroup.GetSectionGroup(config).MailSettings.Smtp;

        static readonly SmtpSection smtp = NetSectionGroup.GetSectionGroup(WebConfigurationManager.OpenWebConfiguration("~/web.config")).MailSettings.Smtp;


        /// <summary>
        /// 发送邮件
        /// </summary>
        /// <param name="message">邮件内容</param>
        public static void PublishTo(MailEntity message)
        {
            try
            {
                string userAddress = message.ToAddress;
                string userName = message.ToName;
                string subject = message.Subject;
                string body = message.Body;
                Encoding encoding = Encoding.UTF8;
                bool isBodyHtml = true;
                var fromAddress = new MailAddress(smtp.Network.UserName, message.FromName); //含有发送人的发送地址
                var toAddress = new MailAddress(userAddress, userName); //含有收件人的接收地址
                var email = new MailMessage(fromAddress, toAddress)
                {
                    IsBodyHtml = isBodyHtml,
                    Subject = subject,
                    Body = body,
                    BodyEncoding = encoding,
                };
                string copys = cc;
                if (!string.IsNullOrEmpty(message.CC))
                {
                    //如果传入cc则不读配置cc
                    copys = message.CC;
                }
                if (!string.IsNullOrEmpty(copys))
                {
                    if (copys.IndexOf(';') == -1)
                    {
                        email.CC.Add(copys);
                    }
                    else
                    {
                        string[] ccs = cc.Split(';');
                        foreach (var s in ccs)
                        {
                            MailAddress copy = new MailAddress(s);
                            email.CC.Add(copy);
                        }
                    }
                }              
                //发送附件
                if (!string.IsNullOrEmpty(message.Attachment) && !string.IsNullOrEmpty(message.AttachmentName))
                {
                    Stream  fileStream = File.OpenRead(message.Attachment);
                    ContentType ct = new ContentType(MediaTypeNames.Text.Plain);
                    Attachment attachment = new Attachment(fileStream, ct);
                    ContentDisposition disposition = attachment.ContentDisposition;
                    //文件名不支持中文。如果是disposition.FileName为中文名则发生失败
                    disposition.FileName = message.AttachmentName;                   
                    email.Attachments.Clear();            
                    email.Attachments.Add(attachment);
                }
                //邮件附件以流的方式写入
                //email.Attachments.Add(new Attachment());//不支持uri

                PublicTo(email);
               
71             }
            catch (Exception e)
            {
                //增加日记
            }
        }

        static void PublicTo(MailMessage mail)
        {
            var client = new SmtpClient
            {
                Host = smtp.Network.Host,
                Credentials = new NetworkCredential(smtp.Network.UserName, smtp.Network.Password),
                Port = smtp.Network.Port,
            };
 
            //开始发送
            client.Send(mail);
            client.Dispose();
        }

配置文件

    <mailSettings>
      <smtp deliveryMethod="Network">
        <network host="mail.5173.com" port="25" userName="archProjectMain@5173.com" password="eue72dsh" />
      </smtp>
    </mailSettings>

邮件实体

    /// <summary>
    /// 邮件实体
    /// </summary>
    [Serializable]
    public class MailEntity
    {
        /// <summary>
        /// 邮件唯一标识，用于备份数据库，便于查找
        /// </summary>
        public string MailId
        {
            get { return DateTime.Now.ToString("yyyyMMdd-HHmmss"); }
        }

        /// <summary>
        /// 发送人名
        /// </summary>
        public string FromName { get; set; }

        /// <summary>
        /// 收件人名
        /// </summary>
        public string ToName { get; set; }

        /// <summary>
        /// 收件人地址
        /// </summary>
        public string ToAddress { get; set; }

        /// <summary>
        /// 标题
        /// </summary>
        public string Subject { get; set; }

        /// <summary>
        /// 内容
        /// </summary>
        [MongoIgnore]
        public string Body { get; set; }

        /// <summary>
        /// 抄送 抄送人以;隔离 
        /// </summary>
        public string CC { get; set; }

        /// <summary>
        /// 邮件附件
        /// </summary>
        public string Attachment { get; set; }

        /// <summary>
        /// 邮件附件名称，不能有中文，否则发送会失败
        /// </summary>
        public string AttachmentName { get; set; }
    }