C#发送邮箱实现代码 

发送邮箱需要开通POP3/SMTP服务，否则QQ邮箱，网易邮箱等会报错。

public static class EmailHelper

{

/// <summary>

/// 发送邮件

/// </summary>

/// <param name="subject">邮件主题</param>

/// <param name="msg">邮件内容</param>

/// <param name="filePath">附件地址，如果不添加附件传null或""</param>

/// <param name="senderEmail">发送人邮箱地址</param>

/// <param name="senderPwd">发送人邮箱密码</param>

/// <param name="recipientEmail">接收人邮箱</param>

public static void SendMail(string subject, string msg, string filePath, string senderEmail, string senderPwd, params string[] recipientEmail)

{

if (!CheckIsNotEmptyOrNull(subject, msg, senderEmail, senderPwd) || recipientEmail == null || recipientEmail.Length == 0)

{

throw new Exception("输入信息无效");

}

try

{

string[] sendFromUser = senderEmail.Split(\'@\');

//构造一个Email的Message对象

MailMessage message = new MailMessage();

//确定smtp服务器地址。实例化一个Smtp客户端

System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient("smtp." + sendFromUser[1]);

//构造发件人地址对象

message.From = new MailAddress(senderEmail, sendFromUser[0], Encoding.UTF8);

//构造收件人地址对象

foreach (string userName in recipientEmail)

{

message.To.Add(new MailAddress(userName, userName.Split(\'@\')[0], Encoding.UTF8));

}

if (!string.IsNullOrEmpty(filePath))

{

Attachment attach = new Attachment(filePath);

//得到文件的信息

ContentDisposition disposition = attach.ContentDisposition;

disposition.CreationDate = System.IO.File.GetCreationTime(filePath);

disposition.ModificationDate = System.IO.File.GetLastWriteTime(filePath);

disposition.ReadDate = System.IO.File.GetLastAccessTime(filePath);

//向邮件添加附件

message.Attachments.Add(attach);

}

//添加邮件主题和内容

message.Subject = subject;

message.SubjectEncoding = Encoding.UTF8;

message.Body = msg;

message.BodyEncoding = Encoding.UTF8;

//设置邮件的信息

client.DeliveryMethod = SmtpDeliveryMethod.Network;

message.BodyEncoding = System.Text.Encoding.UTF8;

message.IsBodyHtml = false;

//如果服务器支持安全连接，则将安全连接设为true。

//gmail,qq支持，163不支持

switch (sendFromUser[1])

{

case "gmail.com":

case "qq.com":

client.EnableSsl = true;

break;

default:

client.EnableSsl = false;

break;

}

//设置用户名和密码。

client.UseDefaultCredentials = false;

//用户登陆信息

NetworkCredential myCredentials = new NetworkCredential(senderEmail, senderPwd);

client.Credentials = myCredentials;

//发送邮件

client.Send(message);

}

catch (Exception ex)

{

throw (ex);

}

}

/// <summary>

/// 验证所有传入字符串不能为空或null

/// </summary>

/// <param name="ps">参数列表</param>

/// <returns>都不为空或null返回true，否则返回false</returns>

public static bool CheckIsNotEmptyOrNull(params string[] ps)

{

if (ps != null)

{

foreach (string item in ps)

{

if (string.IsNullOrEmpty(item)) return false;

}

return true;

}

return false;

}

}