使用Exchange Web服务发送邮件

发送代码，Mail类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography.X509Certificates;
using System.Net;
using System.Net.Security;
using Microsoft.Exchange.WebServices.Data;
using System.Net.Mail;namespace Exchange
{public class Mail{private string sender;/// <summary>/// 发送人/// </summary>public string Sender{get{return sender;}set{sender = value;}}private string senderPw;/// <summary>/// 发送人密码/// </summary>public string SenderPw{get{return senderPw;}set{senderPw = value;}}private string ewsUrl;/// <summary>/// exchange WS地址/// </summary>public string EwsUrl{get{return ewsUrl;}set{ewsUrl = value;}}private ExchangeVersion exVersion;/// <summary>/// exchange version/// </summary>public ExchangeVersion EXVersion{get{return exVersion;}set{exVersion = value;}}/// <summary>/// /// </summary>/// <param name="sender">委托发件人</param>/// <param name="senderPw">密码</param>/// <param name="ewsUrl">exchange webservice地址</param>public Mail(string sender,string senderPw,string ewsUrl){this.sender = sender;this.senderPw = senderPw;this.ewsUrl = ewsUrl;}public Mail(){}/// <summary>/// 发送邮件/// </summary>/// <param name="title"></param>/// <param name="body"></param>/// <param name="receiver"></param>public void Send(string title,string body,string[] receiver){ServicePointManager.ServerCertificateValidationCallback =delegate(Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };// 实例化ExchageServiceExchangeService service = new ExchangeService(EXVersion);// 指定用户名，密码，和域名//service.Credentials = new WebCredentials(CredentialCache.DefaultCredentials);service.Credentials = new WebCredentials(this.Sender, this.SenderPw);// 指定Exchage服务的url地址service.Url = new Uri(this.EwsUrl);EmailMessage message = new EmailMessage(service);// 邮件主题message.Subject = title;message.Body = new MessageBody();// 指定发送邮件的格式，可以是Text和Html格式message.Body.BodyType = BodyType.HTML;// 邮件内容message.Body.Text = body;// 可以添加多个邮件人.也可以添加一个集合，用message.ToRecipients.AddRange(receiver);//message.ToRecipients.Add(userEntry.Properties["Mail"].Value.ToString());message.Send();}/// <summary>/// 发送邮件/// </summary>/// <param name="title"></param>/// <param name="body"></param>/// <param name="receiver"></param>public void Send(string title, string body, string receiver){ServicePointManager.ServerCertificateValidationCallback =delegate(Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };// 实例化ExchageServiceExchangeService service = new ExchangeService(Microsoft.Exchange.WebServices.Data.ExchangeVersion.Exchange2013_SP1);// 指定用户名，密码，和域名//service.Credentials = new WebCredentials(CredentialCache.DefaultCredentials);service.Credentials = new WebCredentials(this.Sender, this.SenderPw);// 指定Exchage服务的url地址service.Url = new Uri(this.EwsUrl);EmailMessage message = new EmailMessage(service);// 邮件主题message.Subject = title;message.Body = new MessageBody();// 指定发送邮件的格式，可以是Text和Html格式message.Body.BodyType = BodyType.HTML;// 邮件内容message.Body.Text = body;ExtendedPropertyDefinition xExperimentalHeader = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.InternetHeaders,"X-Message-ID",MapiPropertyType.String);message.SetExtendedProperty(xExperimentalHeader, "XXXXXXXX");// 可以添加多个邮件人.也可以添加一个集合，用//message.ToRecipients.AddRange(receiver);message.ToRecipients.Add(receiver);message.SendAndSaveCopy();}}
}

测试调用，Program类

using System;namespace Exchange
{class Program{static void Main(string[] args){ try{Exchange.Mail mail = new Exchange.Mail("邮箱用户名（不用带@xx.com）", "密码", "https://IP/EWS/exchange.asmx");mail.Send("Test邮件测试", "Test123", "test@qq.com");Console.WriteLine("发送成功");}catch (Exception ex){Console.WriteLine("发送错误：" + ex);}Console.ReadLine();}}
}