c# 支持SMTP服务器认证的邮件发送类

/// <summary>

/// 邮件服务器域名

/// </summary>

private string mailserver="";

/// <summary>

/// 邮件服务器域名和验证信息

/// 形如："user:pass@www.server.com:25"，也可省略次要信息。如"user:pass@www.server.com"或"www.server.com"

/// </summary>

public string MailDomain

{

set

{

string maidomain=value.Trim();

int tempint;

if(maidomain!="")

{

tempint=maidomain.IndexOf("@");

if(tempint!=-1)

{

string up=maidomain.Substring(0,tempint);

MailServerUserName=up.Substring(0,up.IndexOf(":"));

MailServerPassWord=up.Substring(up.IndexOf(":")+1,up.Length-up.IndexOf(":")-1);

string ms=maidomain.Substring(tempint+1,maidomain.Length-tempint-1);

tempint=ms.IndexOf(":");

if(tempint!=-1)

{

mailserver=ms.Substring(0,tempint);

mailserverport=System.Convert.ToInt32(ms.Substring(tempint+1,ms.Length-tempint-1));