邮件发送类

采用配置方式进行实现，已备后查

<!--mail sender config-->
<system.net>
   <mailSettings>
     <smtp from="XX@XX.com">
       <network host="smtp.XXX.com" userName="XX@XX.com" password="XX" defaultCredentials="true" port="25"/>
     </smtp>
   </mailSettings>
</system.net>

public class Mail { 

        const String BccFrom = "XX@XX.com"; 

        /**//// <summary> 
        /// 邮件发送 
        /// </summary> 
        /// <param name="mailEntity"></param> 
        /// <returns></returns> 
        public Boolean Send ( MailEntity mailEntity ) { 
            Boolean isSucSended = true; 
            try { 
                using ( MailMessage mailMessager = new MailMessage () ) { 

                    //是否按Html方式表现邮件正文 
                    mailMessager.IsBodyHtml = true; 
                    //邮件等级 
                    mailMessager.Priority = MailPriority.High; 
                    //邮件主题 
                    mailMessager.Subject = mailEntity.Subject; 
                    //邮件内容 
                    mailMessager.Body = mailEntity.Body; 
                    //邮件编码 
                    mailMessager.BodyEncoding = System.Text.Encoding.Default; 
                    //邮件收件人（列表） 
                    if ( mailEntity.To.Count > 0 ) { 
                        foreach ( String ccItem in mailEntity.To ) { 
                            mailMessager.To.Add ( ccItem ); 
                        } 
                    } 
                    //抄送人（列表） 
                    if ( mailEntity.CC.Count > 0 ) { 
                        foreach ( String ccItem in mailEntity.CC ) { 
                            mailMessager.CC.Add ( ccItem ); 
                        } 
                    } 
                    //密送发件人（列表） 
                    if ( mailEntity.To.Count > 0 ) { 
                        foreach ( String ccItem in mailEntity.Bcc ) { 
                            mailMessager.Bcc.Add ( ccItem ); 
                        } 
                    } 
                    //默认密送发件人 
                    if ( mailMessager.From != null ) { 
                        mailMessager.Bcc.Add ( mailMessager.From ); 
                    } 
                    else { 
                        mailMessager.Bcc.Add ( BccFrom ); 
                    } 
                    //邮件传送通知选项 
                    mailMessager.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure; 

                    MailAccountEntity mailAccount = GetConfig (); 
                    { 
                        SmtpClient smtpClient = new SmtpClient ( mailAccount.Host , mailAccount.Port ); 
                        { 
                            smtpClient.UseDefaultCredentials = true; 
                            smtpClient.Credentials = new NetworkCredential ( mailAccount.UserName , mailAccount.Password ); 
                            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network; 
                            smtpClient.Send ( mailMessager ); 
                        } 
                    } 
                } 
            } 
            catch ( SmtpFailedRecipientException ex ) { 
                isSucSended = false; 
            } 
            catch ( System.Exception ex ) { 
                isSucSended = false; 
            } 
            return isSucSended; 
        } 

        /**//// <summary> 
        /// 获取MailAccount(SmtpAddress,UserName,Password,Port) 
        /// </summary> 
        /// <returns></returns> 
        private MailAccountEntity GetConfig ( ) { 
            MailAccountEntity mailAccount = new MailAccountEntity (); 
            {

                //读取Config的中MailSettings配置段 
                Configuration config = ConfigurationManager.OpenExeConfiguration ( ConfigurationUserLevel.None ); 
                MailSettingsSectionGroup mailSettings = NetSectionGroup.GetSectionGroup ( config ).MailSettings; 
                SmtpSection stmpSection = mailSettings.Smtp; 
                { 
                    mailAccount.Host = stmpSection.Network.Host; 
                    mailAccount.UserName = stmpSection.Network.UserName; 
                    mailAccount.Password = stmpSection.Network.Password; 
                    mailAccount.Port = stmpSection.Network.Port; 
                } 
            } 
            return mailAccount; 
        } 
    }

 [Serializable]
    public class MailEntity {

        private String subject;
        /**//// <summary>
        /// 邮件主题
        /// </summary>
        public String Subject {
            get {
                return subject;
            }
            set {
                subject = value;
            }
        }

        private String body;
        /**//// <summary>
        /// 邮件内容
        /// </summary>
        public String Body {
            get {
                return body;
            }
            set {
                body = value;
            }
        }

        private List<String> to = new List<String> ();
        /**//// <summary>
        /// 收件人
        /// </summary>
        public List<String> To {
            get {
                return to;
            }
            set {
                to = value;
            }
        }

        private List<String> cc = new List<String> ();
        /**//// <summary>
        /// 抄送 (CC) 收件人的地址集合。 
        /// </summary>
        public List<String> CC {
            get {
                return cc;
            }
            set {
                cc = value;
            }
        }

        private List<String> bcc = new List<String> ();
        /**//// <summary>
        /// 密件抄送 (BCC) 收件人的地址集合 
        /// </summary>
        public List<String> Bcc {
            get {
                return bcc;
            }
            set {
                bcc = value;
            }
        }
    }

[Serializable]
    public class MailAccountEntity {
        private String userName;
        /**//// <summary>
        /// 邮箱用户名
        /// </summary>
        public String UserName {
            get {
                return userName;
            }
            set {
                userName = value;
            }
        }

        private String password;
        /**//// <summary>
        /// 邮箱密码
        /// </summary>
        public String Password {
            get {
                return password;
            }
            set {
                password = value;
            }
        }

        private Int32 port;
        /**//// <summary>
        /// 邮箱port
        /// </summary>
        public Int32 Port {
            get {
                return port;
            }
            set {
                port = value;
            }
        }

        private String host;
        /**//// <summary>
        /// 邮箱host，Smtp
        /// </summary>
        public String Host {
            get {
                return host;
            }
            set {
                host = value;
            }
        }
    }