一、两种发送邮件的方法
有用到两种方式发邮件，一种是用System.Web.Mail类，另一种是System.Net.Mail类。
System.Net.Mail是作为System.Web.Mail的替代存在的。
System.Web.Mail使用时会提示已过时，但目前任然可以正常使用。
二、遇到的问题
我在使用System.Net.Mail发邮件的时候遇到一个问题，如果是用的阿里云服务器，阿里云服务器把邮件的默认25端口给禁用掉了（为的是不让邮件泛滥），25端口被封，阿里云发送SMTP邮件失败。
在网上找了一些资料，主要有以下几种方法解决：
1、在阿里云平台申请解封TCP 25 端口 (Outbound)
2、更换端口号为465 或 587 ；
3、服务器前缀加上 ssl://
4、使用System.Web.Mail发送邮件
2和3我都试用无果，阿里云服务器还是发送邮件失败，最后使用System.Web.Mail发送成功，要是有别的更好的方法请大家告知，谢谢谢谢~~
三、示例
这里我把发邮件一些相关的参数配置在ini文件里（smt服务器、端口号、发件人邮箱、发件人密码、发件人昵称、接收人邮箱）
#region 读写本地IN文件
public static string ReadIniFile(string iniFileName, string section, string key)
{
string strFileName = GetRootPath() + "\\" + iniFileName;
if (!System.IO.File.Exists(strFileName))
{
FileStream fs = System.IO.File.Create(strFileName);
fs.Close();
}
TWays.IniFile localIniFile = new TWays.IniFile(strFileName);
return localIniFile.ReadInivalue(section, key);
}
public static void WriteIniFile(string iniFileName, string section, string key, string value)
{
string strFileName = GetRootPath() + "\\" + iniFileName;
if (!System.IO.File.Exists(strFileName))
{
FileStream fs = System.IO.File.Create(strFileName);
fs.Close();
}
TWays.IniFile localIniFile = new TWays.IniFile(strFileName);
localIniFile.WriteInivalue(section, key, value);
}
#endregion
public const string MonitorLogFileName = "WmsImportSheetLog.Log";
public const string MailSetIniFileName = "MailSet.ini";
public const string MailSetSectionOption = "Option";
public const string MailSetKeySmtpServer = "SmtpServer";//smtp服务器
public const string MailSetKeySmtpPort = "SmtpPort";//端口号
public const string MailSetKeySendAddr = "SendAddr";//发件人邮箱
public const string MailSetKeySendPwd = "SendPwd";//发件人密码
public const string MailSetKeySendUser = "SendUser";//发件人名称，可随意定义
public const string MailSetKeyReceiAddr = "ReceiAddr";//收件人邮箱
//如果ini文件内没有内容就设置默认值
public void WriteMailSet()
{
string strFileName = BusiUtils.GetRootPath() + "\\" + Constant.MailSetIniFileName;
if (!System.IO.File.Exists(strFileName))
{
BusiUtils.WriteIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySmtpServer, "smtp.163.com");
BusiUtils.WriteIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySmtpPort, "465");
BusiUtils.WriteIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendAddr, "lala12121@163.com");
string sendPwd = "lalala2017";
sendPwd = TWays.Utils.EncryptString(sendPwd);
BusiUtils.WriteIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendPwd, sendPwd);
BusiUtils.WriteIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendUser, "系统管理员");
//多个收件人用 ' ；' 号隔开
BusiUtils.WriteIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeyReceiAddr, "1234@qq.com;5678@qq.com;2579@qq.com;");
}
}
System.Web.Mail
public bool Process()
{
bool boolReturn = false;
try
{
string errorMsg = string.Empty;
string title = "每日单据导入情况" + "-" + DateTime.Now.ToString("yyyy-MM -dd");
string message = string.Empty;
try
{
WriteMailSet();
bool bl = true;
DataSet ds = DataAdapter.Query(SqlText.selectImportSheetErrorLog.ToUpper());
#region
if (ds == null || ds.Tables.Count == 0 || ds.Tables[0].Rows.Count <= 0)
{
message = "单据处理成功!";
}
else
{
StringBuilder sb = new StringBuilder();
sb.Append("以下为单据导入异常的消息:\r\n\r\n");
foreach (DataRow dr in ds.Tables[0].Rows)
{
bl = false;
sb.Append(" 任务编号:" + dr["TASK_CODE"].ToString() + ",\t");
sb.Append(" 任务名称:" + dr["TASK_NAME"].ToString() + ",\t");
sb.Append(" 日志消息:" + dr["MEMO"].ToString());
sb.Append("\r\n");
}
message = sb.ToString();
}
#endregion
if (bl)
{
title = "[成功]" + title;
}
}
catch (Exception Ex)
{
message = Ex.Message;
errorMsg = "邮件发送失败！错误信息:" + message;
message = "Error:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return boolReturn;
}
#region 发送邮件
try
{
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, "发送" + title + "开始\r\n", true);
bool result = Monitor(title, message, "", "");
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, "发送" + title + "结束\r\n", true);
}
catch (Exception Ex)
{
errorMsg = "邮件发送失败！错误信息:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return boolReturn;
}
#endregion
Result = "Succeed";
boolReturn = true;
}
catch (Exception ex)
{
Result = ex.Message;
}
return boolReturn;
}
private bool Monitor(string title, string message, string fileName, string shortFileName)
{
string smtpServer = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySmtpServer);
string smtpPort = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySmtpPort);
string sendAddr = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendAddr);
string sendPwd = Utils.DecryptString(BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendPwd));
string receiAddr = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeyReceiAddr);
string errorMsg = string.Empty;
try
{
System.Web.Mail.MailMessage mmsg = new System.Web.Mail.MailMessage();
//邮件主题
mmsg.Subject = title;
//mmsg.BodyFormat = System.Web.Mail.MailFormat.Html;
//邮件正文
mmsg.Body = message;
//正文编码
mmsg.BodyEncoding = Encoding.UTF8;
//优先级
mmsg.Priority = System.Web.Mail.MailPriority.High;
System.Web.Mail.MailAttachment data = null;
//if (SUpFile != "")
//{
// SUpFile = HttpContext.Current.Server.MapPath(SUpFile);//获得附件在本地地址
// System.Web.Mail.MailAttachment attachment = new System.Web.Mail.MailAttachment(SUpFile); //create the attachment
// mmsg.Attachments.Add(attachment); //add the attachment
//}
//发件者邮箱地址
mmsg.From = string.Format("\"{0}\"<{1}>", "方予系统管理员", sendAddr);
//收件人收箱地址
mmsg.To = receiAddr;
mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
//用户名
mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", sendAddr);
//密码 不是邮箱登陆密码 而是邮箱设置POP3/SMTP 时生成的第三方客户端授权码
mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", sendPwd);
//端口
mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", smtpPort);
//使用SSL
mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true");
//Smtp服务器
System.Web.Mail.SmtpMail.SmtpServer = smtpServer;
System.Web.Mail.SmtpMail.Send(mmsg);
System.Threading.Thread.Sleep(20000);
}
catch (Exception Ex)
{
errorMsg = "邮件发送失败！错误信息:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return false;
}
return true;
}
System.Net.Mail
SmtpClient SmtpClient = null; //设置SMTP协议
MailAddress MailAddress_from = null; //设置发信人地址 当然还需要密码
MailAddress MailAddress_to = null; //设置收信人地址 不需要密码
MailMessage MailMessage_Mai = null;
FileStream FileStream_my = null; //附件文件流
public bool Process()
{
bool boolReturn = false;
try
{
string errorMsg = string.Empty;
string title = "每日单据导入情况" + "-" + DateTime.Now.ToString("yyyy-MM-dd");
string message = string.Empty;
try
{
WriteMailSet();
bool bl = true;
DataSet ds = DataAdapter.Query(SqlText.selectImportSheetErrorLog.ToUpper());
#region
if (ds == null || ds.Tables.Count == 0 || ds.Tables[0].Rows.Count <= 0)
{
message = "单据导入成功!";
}
else
{
StringBuilder sb = new StringBuilder();
sb.Append("以下为单据导入异常的消息:\r\n\r\n");
foreach (DataRow dr in ds.Tables[0].Rows)
{
bl = false;
sb.Append(" 任务编号:" + dr["TASK_CODE"].ToString() + ",\t");
sb.Append(" 任务名称:" + dr["TASK_NAME"].ToString() + ",\t");
sb.Append(" 日志消息:" + dr["MEMO"].ToString());
sb.Append("\r\n");
}
message = sb.ToString();
}
#endregion
if (bl)
{
title = "[成功]" + title;
}
}
catch (Exception Ex)
{
message = Ex.Message;
errorMsg = "邮件发送失败！错误信息:" + message;
message = "Error:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return boolReturn;
}
#region 发送邮件
try
{
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, "发送" + title + "开始\r\n", true);
bool result = Monitor(title, message, "", "");
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, "发送" + title + "结束\r\n", true);
}
catch (Exception Ex)
{
errorMsg = "邮件发送失败！错误信息:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return boolReturn;
}
#endregion
Result = "Succeed";
boolReturn = true;
}
catch (Exception ex)
{
Result = ex.Message;
}
return boolReturn;
}
private bool Monitor(string title, string message, string fileName, string shortFileName)
{
string smtpServer = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySmtpServer);
string smtpPort = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySmtpPort);
string sendAddr = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendAddr);
string sendPwd = Utils.DecryptString(BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendPwd));
string receiAddr = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeyReceiAddr);
string errorMsg = string.Empty;
try
{
//初始化Ｓmtp服务器信息
setSmtpClient(smtpServer, Convert.ToInt32(smtpPort));
}
catch (Exception Ex)
{
errorMsg = "邮件发送失败,请确定SMTP服务名是否正确！错误信息:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return false;
}
try
{
//验证发件邮箱地址和密码
setAddressform(sendAddr, sendPwd);
}
catch (Exception Ex)
{
errorMsg = "邮件发送失败,请确定发件邮箱地址和密码的正确性！错误信息:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return false;
}
try
{
MailMessage_Mai = null;
MailMessage_Mai = new MailMessage();
//清空历史发送信息 以防发送时收件人收到的错误信息(收件人列表会不断重复)
MailMessage_Mai.To.Clear();
string[] recAddress = receiAddr.Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
//添加收件人邮箱地址
for (int i = 0; i < recAddress.Length; i++)
{
MailAddress_to = new MailAddress(recAddress[i]);
MailMessage_Mai.To.Add(MailAddress_to);
}
//发件人邮箱
MailMessage_Mai.From = MailAddress_from;
//邮件主题
MailMessage_Mai.Subject = title;
MailMessage_Mai.SubjectEncoding = System.Text.Encoding.UTF8;
//邮件正文
MailMessage_Mai.Body = message;
MailMessage_Mai.BodyEncoding = System.Text.Encoding.UTF8;
//清空历史附件 以防附件重复发送
//MailMessage_Mai.Attachments.Clear();
//FileStream_my = new FileStream(fileName, FileMode.Open);
//string name = FileStream_my.Name;
////添加附件
//MailMessage_Mai.Attachments.Add(new Attachment(FileStream_my, shortFileName));
//注册邮件发送完毕后的处理事件
SmtpClient.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback);
//开始发送邮件
SmtpClient.SendAsync(MailMessage_Mai, "000000000");
System.Threading.Thread.Sleep(30000);
}
catch (Exception Ex)
{
errorMsg = "邮件发送失败！错误信息:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
return false;
}
return true;
}
#region 设置Ｓmtp服务器信息
/// <summary>
/// 设置Ｓmtp服务器信息
/// </summary>
/// <param name="ServerName">SMTP服务名</param>
/// <param name="Port">端口号</param>
private void setSmtpClient(string ServerHost, int Port)
{
SmtpClient = new SmtpClient();
SmtpClient.Host = ServerHost;//指定SMTP服务名 例如QQ邮箱为 smtp.qq.com 新浪cn邮箱为 smtp.sina.cn等
SmtpClient.Port = Port; //指定端口号
SmtpClient.Timeout = 5; //超时时间
SmtpClient.EnableSsl = true; //指定 SmtpClient 使用安全套接字层 (SSL) 加密连接
}
#endregion
#region 验证发件人信息
/// <summary>
/// 验证发件人信息
/// </summary>
/// <param name="MailAddress">发件邮箱地址</param>
/// <param name="MailPwd">邮箱密码</param>
private void setAddressform(string MailAddress, string MailPwd)
{
string sendUser = BusiUtils.ReadIniFile(Constant.MailSetIniFileName, Constant.MailSetSectionOption, Constant.MailSetKeySendUser);
//创建服务器认证
NetworkCredential NetworkCredential_my = new NetworkCredential(MailAddress, MailPwd);
//实例化发件人地址
MailAddress_from = new System.Net.Mail.MailAddress(MailAddress, sendUser, Encoding.BigEndianUnicode);
//指定发件人信息 包括邮箱地址和邮箱密码
SmtpClient.Credentials = new System.Net.NetworkCredential(MailAddress_from.Address, MailPwd);
}
#endregion
#region 发送邮件后所处理的函数
private void SendCompletedCallback(object sender, AsyncCompletedEventArgs e)
{
string errorMsg = string.Empty;
try
{
if (e.Cancelled)
{
errorMsg = "发送已取消！";
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
}
if (e.Error != null)
{
errorMsg = "邮件发送失败！1错误信息:" + e.Error.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
}
else
{
errorMsg = "恭喜,邮件成功发出！";
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
}
if (FileStream_my != null)
{
FileStream_my.Close();
}
}
catch (Exception Ex)
{
errorMsg = "邮件发送失败！2错误信息:" + Ex.Message;
TWays.Core.Loger.LogMessage(BusiUtils.GetRootPath() + "\\" + Constant.MonitorLogFileName, errorMsg + "\r\n", true);
}
}
#endregion
以上就是c# 两种发送邮件的方法的详细内容，更多关于c# 发送邮件的资料请关注自学编程网其它相关文章！
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