C# 发送纯文本的电子邮件（e-mail）

邮件发送技巧

最新推荐文章于 2025-10-09 16:06:02 发布

最新推荐文章于 2025-10-09 16:06:02 发布 · 323 阅读

最近需要做个邮件提醒功能，使用公司的邮件服务器发送没问题，但我试着用 163 的邮箱去发，结果总是失败！

有待解决的有两个问题：一是使用其它服务器发送邮件，如 163的。二是发送HTML 内容和附件

下面是使用异步发送和非异步的方法，这是部分代码说明发送邮件比较简单。横线下面是封的全部代码

/// <summary>
/// 发送邮件
/// </summary>
public bool Send()
{
MailMessage message = null;
try
{
message = new MailMessage(this.From, this.To, this.Subject, this.Body);
message.IsBodyHtml = true;
m_client.Timeout = this.Timeout;
message.Priority = System.Net.Mail.MailPriority.High;
m_client.Credentials = CredentialCache.DefaultNetworkCredentials;
m_client.Send(message);
return true;
}
catch (Exception ex)
{
Grass.Log.ExceptionsStack.RegisterError(ex);
return false;
}
finally
{
if (message != null)
message.Dispose();
}
}
#region 异步发送
/// <summary>
/// 异步发送邮件
/// </summary>
public void SendAsync()
{
MailMessage message = null;
try
{
message = new MailMessage(this.From, this.To, this.Subject, this.Body);
message.IsBodyHtml = true;
m_client.Timeout = this.Timeout;
message.Priority = System.Net.Mail.MailPriority.High;
m_client.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
m_client.Credentials = CredentialCache.DefaultNetworkCredentials;
m_client.SendAsync(message, "send e-mail");
}
catch (Exception ex)
{
Grass.Log.ExceptionsStack.RegisterError(ex);
throw;
}
finally
{
//if (message != null)
// message.Dispose();
}
}
/// <summary>
/// 异步邮件发送完成事件
/// </summary>
public void SendCompletedCallback(object sender, AsyncCompletedEventArgs e)
{
if (this.OnSendComplete != null)
{
// Get the unique identifier for this asynchronous operation.
String token = (string)e.UserState;

if (e.Cancelled)
{
OnSendComplete(false, token, string.Format("[{0}] 发送取消.", token));
}
else if (e.Error != null)
{
OnSendComplete(false, token, string.Format("[{0}] 发送错误：{1}", token, e.Error.Message));
}
else
{
OnSendComplete(false, token, string.Format("[{0}] 发送成功.", token));
}
}
}

#endregion

--------------------------------------------------------------------------------------------------------------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Net;
using System.ComponentModel;

namespace Grass.Framework.Mail
{
/// <summary>
/// 使用 SMTP(Simple Mail Transfer Protocol) 邮件协议发送邮件
/// </summary>
public class SmtpHelper:IMailHelper
{
/// <summary>
/// 使用 SMTP 协议发送 E-mail
/// </summary>
/// <param name="host">发件服务器</param>
public SmtpHelper(string host)
{
this.Host = host;
m_client = new SmtpClient(host);
}
/// <summary>
/// 使用 SMTP 协议发送 E-mail
/// </summary>
/// <param name="host">发件服务器（IP）</param>
/// <param name="prot">发件服务器端口号</param>
public SmtpHelper(string host, int prot)
{
this.Host = host;
this.Prot = prot;
m_client = new SmtpClient(host, prot);
}
private int m_timeout = 1000;
private SmtpClient m_client = null;
/// <summary>
/// 发件服务器
/// </summary>
public string Host { set; get; }
/// <summary>
/// 发件服务器端口号
/// </summary>
public int Prot { set; get; }
/// <summary>
/// 发件超时时间
/// </summary>
public int Timeout
{
set { m_timeout = value; }
get { return m_timeout; }
}
/// <summary>
/// 发送到，如果多个邮箱使用半角逗号分隔开
/// </summary>
public string To { set; get; }
/// <summary>
/// 发送者
/// </summary>
public string From { set; get; }
/// <summary>
/// 主题
/// </summary>
public string Subject { set; get; }
/// <summary>
/// 发送内容
/// </summary>
public string Body { set; get; }