c# 支持SMTP服务器认证的邮件发送类

private string Base64Encode(string estr)

{

byte[] barray;

barray=Encoding.Default.GetBytes(estr);

return Convert.ToBase64String(barray);

}

/// <summary>

/// 将Base64字符串解码为普通字符串

/// </summary>

/// <param name="dstr">要解码的字符串</param>

private string Base64Decode(string dstr)

{

byte[] barray;

barray=Convert.FromBase64String(dstr);

return Encoding.Default.GetString(barray);

}

public ESmtpMail()

{

}

~esmtpmail()

{

}

/// <summary>

/// 收件人姓名

/// </summary>

public string RecipientName="";

private int RecipientNum=0;//收件人数量

private int RecipientBCCNum=0;//密件收件人数量

/// <summary>

/// 添加一个收件人

/// </summary>

/// <param name="str">收件人地址</param>