.NET 1.1 下不使用 System.Web.Mail.SmtpMail 发…

msg.From = from;
msg.Priority = GetOpenSmtpPriority(message.Priority);

//添加收件人
string[] toArray = MySmtpMail.GetTo(message);
if (toArray != null)
{
foreach (string to in toArray)
{
if (!Globals.IsNullorEmpty(to))
msg.AddRecipient(to, AddressType.To);
}
}

string[] ccArray = MySmtpMail.GetCc(message);
if (ccArray != null)
{
foreach (string cc in ccArray)
{
if (!Globals.IsNullorEmpty(cc))
msg.AddRecipient(cc, AddressType.Cc);
}
}

string[] bccArray = MySmtpMail.GetBcc(message);
if (ccArray != null)
{
foreach (string bcc in bccArray)
{
if (!Globals.IsNullorEmpty(bcc))
msg.AddRecipient(bcc, AddressType.Bcc);
}
}

msg.Subject = message.Subject;

if (message.BodyFormat == System.Web.Mail.MailFormat.Html)
{
msg.HtmlBody = message.Body "<br><br>" DateTime.Now.ToString();
}
else
{
msg.Body = message.Body "\r\n\r\n" DateTime.Now.ToString();;
}

string str1 = msg.HtmlBody;
string str2 = msg.Body;

smtp.Host = smtpServer;
smtp.Username = serverUsername;
smtp.Password = serverPassword;
smtp.Port = smtpPort;

smtp.SendMail(msg);

return true;
}

public override void Close()
{
msg = null;
smtp = null;
}

private static string GetOpenSmtpPriority( System.Web.Mail.MailPriority priority)
{
// 邮件等级，1为加急，3为普通，5为低级

if (priority == System.Web.Mail.MailPriority.High)
return OpenSmtp.Mail.MailPriority.High;

if (priority == System.Web.Mail.MailPriority.Low)
return OpenSmtp.Mail.MailPriority.Low;

return OpenSmtp.Mail.MailPriority.Normal;
}

#endregion
}
}

实现方案三：

（上面两种实现方案已经足够满足目前的需求，有必要的话再继续扩展）

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