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C# 发送邮件 SMTP

2017-12-21 11:32 369 查看

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Net.Mail;

using System.Text;

using System.Threading.Tasks;

namespace WindowsFormsApplication1
{

//在使用 System.Net.Mail组建发送邮件的时候出现了"命令顺序不正确。服务器响应为: Error: need EHLO and AUTH first !"异常

//1. 需要开启 POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务并且记住授权码

//2. 使用授权码(不要用qq邮箱登录密码)

//3.启用smtp.EnableSsl = true;

/// <summary>

/// Author : junlu

/// Date : :2017年12月21日

/// Description : 邮件发送辅助类

/// </summary>

public class EmailHelper

{

#region [ 属性(发送Email相关) ]

private string _SmtpHost = string.Empty;

private int _SmtpPort = -1;

private string _FromEmailAddress = string.Empty;

private string _FormEmailPassword = string.Empty;

/// <summary>

/// smtp 服务器

/// </summary>

public string SmtpHost

{

get

{

if (string.IsNullOrEmpty(_SmtpHost))

{

_SmtpHost = "smtp.qq.com"; //这里是qq服务器

}

return _SmtpHost;

}

}

/// <summary>

/// smtp 服务器端口默认为25

/// </summary>

public int SmtpPort

{

get

{

if (_SmtpPort == -1)

{

_SmtpPort = 25;

}

return _SmtpPort;

}

}

/// <summary>

/// 发送者 Eamil 地址

/// </summary>

public string FromEmailAddress

{

get

{

if (string.IsNullOrEmpty(_FromEmailAddress))

{

_FromEmailAddress = "123456789@qq.com";

}

return _FromEmailAddress;

}

}

/// <summary>

/// 发送者 Eamil 密码

/// </summary>

public string FormEmailPassword

{

get

{

if (string.IsNullOrEmpty(_FormEmailPassword))

{

_FormEmailPassword = "授权码";

}

return _FormEmailPassword;

}

}

#endregion

#region [ 属性(邮件相关) ]

/// <summary>

/// 收件人 Email 列表，多个邮件地址之间用半角逗号分开

/// </summary>

public string ToList { get; set; }

/// <summary>

/// 邮件的抄送者，支持群发，多个邮件地址之间用半角逗号分开

/// </summary>

public string CCList { get; set; }

/// <summary>

/// 邮件的密送者，支持群发，多个邮件地址之间用半角逗号分开

/// </summary>

public string BccList { get; set; }

/// <summary>

/// 邮件标题

/// </summary>

public string Subject { get; set; }

/// <summary>

/// 邮件正文

/// </summary>

public string Body { get; set; }

private bool _IsBodyHtml = true;

/// <summary>

/// 邮件正文是否为Html格式

/// </summary>

public bool IsBodyHtml

{

get { return _IsBodyHtml; }

set { _IsBodyHtml = value; }

}

/// <summary>

/// 附件列表

/// </summary>

public List<Attachment> AttachmentList { get; set; }

#endregion

#region [ 构造函数 ]

/// <summary>

/// 构造函数 (body默认为html格式)

/// </summary>

/// <param name="toList">收件人列表</param>

/// <param name="subject">邮件标题</param>

/// <param name="body">邮件正文</param>

public EmailHelper(string toList, string subject, string body)

{

this.ToList = toList;

this.Subject = subject;

this.Body = body;

}

/// <summary>

/// 构造函数

/// </summary>

/// <param name="toList">收件人列表</param>

/// <param name="subject">邮件标题</param>

/// <param name="isBodyHtml">邮件正文是否为Html格式</param>

/// <param name="body">邮件正文</param>

public EmailHelper(string toList, string subject, bool isBodyHtml, string body)

{

this.ToList = toList;

this.Subject = subject;

this.IsBodyHtml = isBodyHtml;

this.Body = body;

}

/// <summary>

/// 构造函数

/// </summary>

/// <param name="toList">收件人列表</param>

/// <param name="ccList">抄送人列表</param>

/// <param name="bccList">密送人列表</param>

/// <param name="subject">邮件标题</param>

/// <param name="isBodyHtml">邮件正文是否为Html格式</param>

/// <param name="body">邮件正文</param>

public EmailHelper(string toList, string ccList, string bccList, string subject, bool isBodyHtml, string body)

{

this.ToList = toList;

this.CCList = ccList;

this.BccList = bccList;

this.Subject = subject;

this.IsBodyHtml = isBodyHtml;

this.Body = body;

}

/// <summary>

/// 构造函数

/// </summary>

/// <param name="toList">收件人列表</param>

/// <param name="ccList">抄送人列表</param>

/// <param name="bccList">密送人列表</param>

/// <param name="subject">邮件标题</param>

/// <param name="isBodyHtml">邮件正文是否为Html格式</param>

/// <param name="body">邮件正文</param>

/// <param name="attachmentList">附件列表</param>

public EmailHelper(string toList, string ccList, string bccList, string subject, bool isBodyHtml, string body, List<Attachment> attachmentList)

{

this.ToList = toList;

this.CCList = ccList;

this.BccList = bccList;

this.Subject = subject;

this.IsBodyHtml = isBodyHtml;

this.Body = body;

this.AttachmentList = attachmentList;

}

#endregion

#region [ 发送邮件 ]

/// <summary>

/// 发送邮件

/// </summary>

/// <returns></returns>

public void Send()

{

MailMessage mm = new MailMessage(); //实例化一个邮件类

SmtpClient smtp = new SmtpClient(); //实例化一个SmtpClient

smtp.DeliveryMethod = SmtpDeliveryMethod.Network; //将smtp的出站方式设为 Network

smtp.EnableSsl = true; //smtp服务器是否启用SSL加密

smtp.Host = this.SmtpHost; //指定 smtp 服务器地址

smtp.Port = this.SmtpPort; //指定 smtp 服务器的端口，默认是25，如果采用默认端口，可省去

smtp.UseDefaultCredentials = true; //如果你的SMTP服务器不需要身份认证，则使用下面的方式，不过，目前基本没有不需要认证的了

smtp.Credentials = new NetworkCredential(this.FromEmailAddress, this.FormEmailPassword); //如果需要认证，则用下面的方式

mm.Priority = MailPriority.Normal; //邮件的优先级，分为 Low, Normal, High，通常用 Normal即可

mm.From = new MailAddress(this.FromEmailAddress, "管理员", Encoding.GetEncoding(936));

//收件人

if (!string.IsNullOrEmpty(this.ToList))

mm.To.Add(this.ToList);

//抄送人

if (!string.IsNullOrEmpty(this.CCList))

mm.CC.Add(this.CCList);

//密送人

if (!string.IsNullOrEmpty(this.BccList))

mm.Bcc.Add(this.BccList);

mm.Subject = this.Subject; //邮件标题

mm.SubjectEncoding = Encoding.GetEncoding(936); //这里非常重要，如果你的邮件标题包含中文，这里一定要指定，否则对方收到的极有可能是乱码。

mm.IsBodyHtml = this.IsBodyHtml; //邮件正文是否是HTML格式

mm.BodyEncoding = Encoding.GetEncoding(936); //邮件正文的编码，设置不正确，接收者会收到乱码

mm.Body = this.Body; //邮件正文

//邮件附件

if (this.AttachmentList != null && this.AttachmentList.Count > 0)

{

foreach (Attachment attachment in this.AttachmentList)

{

mm.Attachments.Add(attachment);

}

}

//发送邮件，如果不返回异常，则大功告成了。

smtp.Send(mm);

}

#endregion

}
}

//测试代码

try

{

EmailHelper email = new EmailHelper("23456789@qq.com", "测试邮件2", "asdasdasdasds");

email.Send();

MessageBox.Show("发送成功！");

}

catch (Exception ex)

{

MessageBox.Show("发送失败！失败原因：");

MessageBox.Show(ex.Message);



}

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标签： EmailHelper 发送邮件 qq邮件 SMTP

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