1，使用Asp.net 實現郵件系統
<summary>
?2????????///?功能：實現在Web頁面中發送Email
?3????????///?</summary>
?4????????private?void?SendMail()
?5????????{
?6????????????MailMessage?m?=?new?MailMessage();
?7????????????
?8????????????/**////發件人地址
?9????????????m.From?=?tbFrom.Text;
10
11????????????/**////收件人地址
12????????????m.To?=?tbTo.Text;
13
14????????????/**////郵件主題
15????????????m.Subject?=?tbSubject.Text;
16
17????????????/**////郵件內容
18????????????m.Body?=?tbBody.Text;
19
20????????????/**////優先級
21????????????switch(ddlp.SelectedIndex)
22????????????{
23????????????????case?0:
24????????????????????m.Priority?=?MailPriority.High;
25????????????????????break;
26????????????????case?1:
27????????????????????m.Priority?=?MailPriority.Low;
28????????????????????break;
29????????????????default:
30????????????????????m.Priority?=?MailPriority.Normal;
31????????????????????break;
32????????????}
33
34????????????/**////設置郵件格式
35????????????if(ddlp.SelectedIndex==0)
36????????????????m.BodyFormat?=?MailFormat.Text;
37????????????else
38????????????????m.BodyFormat?=?MailFormat.Html;
39
40????????????/**////設置服務器
41????????????if(tbServer.Text!="")
42????????????{
43????????????????SmtpMail.SmtpServer?=?tbServer.Text;
44????????????}
45
46????????????/**////以下處理附件?
47????????????string?strFileName?=?FileSelect.PostedFile.FileName;
48????????????if(strFileName!="")
49????????????????m.Attachments.Add(new?MailAttachment(strFileName));
50
51????????????/**////發送郵件
52????????????SmtpMail.Send(m);
53????????}

2利用socket接受郵件
/**////?<summary>
?2????????///?接收郵件
?3????????///?</summary>
?4????????private?void?SocketPopMail()
?5????????{
?6????????????POP3?pop?=?new?POP3(tbServer.Text,tbUser.Text,tbPass.Text);
?7????????????int?n?=?pop.GetNumberOfNewMessages();
?8????????????if(n==-1)
?9????????????{
10????????????????Response.Write("<script?language='javascript'>alert('服務器連接錯誤！')</script>");
11????????????????return;
12????????????}
13????????????ddlNew.Items.Clear();
14????????????for(int?i=1;i<=n;i++)
15????????????????ddlNew.Items.Add("第"+i.ToString()+"封郵件");
16????????????if(n>0)
17????????????{
18????????????????MailMessage?msg?=??pop.GetNewMessages(0);
19????????????????if(msg!=null)
20????????????????????tbBody.Text?=?msg.Body;
21????????????}
22????????}
pop3類的實現如下：
1/**////?<summary>
??2????///?接收郵件類
??3????///?</summary>
??4????public?class?POP3
??5????{
??6????????string?POPServer;
??7????????string?user;
??8????????string?pwd;
??9????????NetworkStream?ns;
?10????????StreamReader?sr;
?11
?12????????public?POP3(){}
?13
?14????????public?POP3(string?server,?string?_user,?string?_pwd)
?15????????{
?16????????????POPServer?=?server;
?17????????????user?=?_user;
?18????????????pwd?=?_pwd;
?19????????}
?20????????
?21????????/**////?<summary>
?22????????///?連接服務器
?23????????///?</summary>
?24????????///?<returns></returns>
?25????????private?bool?Connect()
?26????????{
?27????????????TcpClient?sender?=?new?TcpClient(POPServer,110);
?28????????????byte[]?outbytes;
?29????????????string?input;
?30
?31????????????try
?32????????????{
?33????????????????ns?=?sender.GetStream();
?34????????????????sr?=?new?StreamReader(ns);
?35
?36????????????????sr.ReadLine();
?37????????????????input?=?"user?"?+?user?+?"\r\n";
?38????????????????outbytes?=?System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
?39????????????????ns.Write(outbytes,0,outbytes.Length)?;
?40????????????????sr.ReadLine();
?41????????????
?42????????????????input?=?"pass?"?+?pwd?+?"\r\n";
?43????????????????outbytes?=?System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
?44????????????????ns.Write(outbytes,0,outbytes.Length)?;
?45????????????????sr.ReadLine();
?46????????????????return?true;??
?47????????
?48????????????}
?49????????????catch
?50????????????{
?51????????????????return?false;
?52????????????}
?53????????}
?54????????
?55????????/**////?<summary>
?56????????///?斷開與服務器的連接
?57????????///?</summary>
?58????????private?void?Disconnect()
?59????????{
?60????????????string?input?=?"quit"?+?"\r\n";
?61????????????Byte[]?outbytes?=?System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
?62????????????ns.Write(outbytes,0,outbytes.Length);
?63????????????ns.Close();
?64????????}
?65
?66????????public?int?GetNumberOfNewMessages()
?67????????{
?68????????????byte[]?outbytes;
?69????????????string?input;
?70
?71????????????try
?72????????????{
?73????????????????Connect();
?74
?75????????????????input?=?"stat"?+?"\r\n";
?76????????????????outbytes?=?System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
?77????????????????ns.Write(outbytes,0,outbytes.Length);
?78????????????????string?resp?=?sr.ReadLine();
?79????????????????string[]?tokens?=?resp.Split(new?Char[]?{'?'});
?80
?81????????????????Disconnect();
?82
?83????????????????return?Convert.ToInt32(tokens[1]);
?84????????????}
?85????????????catch
?86????????????{
?87????????????????return?-1;
?88????????????}
?89????????}
?90????????public?ArrayList?GetNewMessages(string?subj)
?91????????{
?92
?93????????????int?newcount;
?94????????????ArrayList?newmsgs?=?new?ArrayList();
?95
?96????????????try
?97????????????{
?98????????????????newcount?=?GetNumberOfNewMessages();
?99????????????????Connect();
100
101????????????????for(int?n=1;?n<newcount+1;?n++)
102????????????????{
103????????????????????ArrayList?msglines?=?GetRawMessage(n);
104????????????????????string?msgsubj?=?GetMessageSubject(msglines);
105????????????????????if(msgsubj.CompareTo(subj)?==?0)
106????????????????????{
107????????????????????????System.Web.Mail.MailMessage?msg?=?new?MailMessage();
108????????????????????????msg.Subject?=?msgsubj;
109????????????????????????msg.From?=?GetMessageFrom(msglines);
110????????????????????????msg.Body?=?GetMessageBody(msglines);
111????????????????????????newmsgs.Add(msg);
112????????????????????????DeleteMessage(n);
113????????????????????}
114????????????????}
115
116????????????????Disconnect();
117????????????????return?newmsgs;
118????????????}
119????????????catch(Exception?e)
120????????????{
121????????????????return?newmsgs;
122????????????}
123????????}
124
125????????/**////?<summary>
126????????///?獲取新郵件
127????????///?</summary>
128????????///?<param?name="nIndex"></param>
129????????///?<returns></returns>
130????????public?MailMessage?GetNewMessages(int?nIndex)
131????????{
132????????????int?newcount;
133????????????System.Web.Mail.MailMessage?msg?=?new?MailMessage();
134
135????????????try
136????????????{
137????????????????newcount?=?GetNumberOfNewMessages();
138????????????????Connect();
139????????????????int?n?=?nIndex+1;
140
141????????????????if(n<newcount+1)
142????????????????{
143????????????????????ArrayList?msglines?=?GetRawMessage(n);
144????????????????????string?msgsubj?=?GetMessageSubject(msglines);
145????????????????
146????????????????????
147????????????????????msg.Subject?=?msgsubj;
148????????????????????msg.From?=?GetMessageFrom(msglines);
149????????????????????msg.Body?=?GetMessageBody(msglines);
150????????????????}
151
152????????????????Disconnect();
153????????????????return?msg;
154????????????}
155????????????catch
156????????????{
157????????????????return?null;
158????????????}
159????????}
160????????private?ArrayList?GetRawMessage?(int?messagenumber)
161????????{
162????????????Byte[]?outbytes;
163????????????string?input;
164????????????string?line?=?"";
165
166????????????input?=?"retr?"?+?messagenumber.ToString()?+?"\r\n";
167????????????outbytes?=?System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
168????????????ns.Write(outbytes,0,outbytes.Length);
169
170????????????ArrayList?msglines?=?new?ArrayList();
171????????????do
172????????????{
173????????????????line?=?sr.ReadLine();
174????????????????msglines.Add(line);
175????????????}?while?(line?!=?".");
176????????????msglines.RemoveAt(msglines.Count-1);
177
178????????????return?msglines;
179????????}
180
181????????/**////?<summary>
182????????///?獲取郵件主題
183????????///?</summary>
184????????///?<param?name="msglines"></param>
185????????///?<returns></returns>
186????????private?string?GetMessageSubject(ArrayList?msglines)
187????????{
188????????????string[]?tokens;
189????????????IEnumerator?msgenum?=?msglines.GetEnumerator();
190????????????while?(msgenum.MoveNext()?)
191????????????{
192????????????????string?line?=?(string)msgenum.Current;
193????????????????if(line.StartsWith("Subject:")?)
194????????????????{
195????????????????????tokens?=?line.Split(new?Char[]?{'?'});
196????????????????????return?tokens[1].Trim();
197????????????????}
198????????????}
199????????????return?"None";
200????????}
201
202????????/**////?<summary>
203????????///?獲取郵件源地址
204????????///?</summary>
205????????///?<param?name="msglines"></param>
206????????///?<returns></returns>
207????????private?string?GetMessageFrom?(ArrayList?msglines)
208????????{
209????????????string[]?tokens;
210????????????IEnumerator?msgenum?=?msglines.GetEnumerator();
211????????????while?(msgenum.MoveNext()?)
212????????????{
213????????????????string?line?=?(string)msgenum.Current;
214????????????????if(line.StartsWith("From:")?)
215????????????????{
216????????????????????tokens?=?line.Split(new?Char[]?{'<'});
217????????????????????return?tokens[1].Trim(new?Char[]?{'<','>'});
218????????????????}
219????????????}
220????????????return?"None";
221????????}
222
223????????/**////?<summary>
224????????///?獲取郵件內容
225????????///?</summary>
226????????///?<param?name="msglines"></param>
227????????///?<returns></returns>
228????????private?string?GetMessageBody(ArrayList?msglines)
229????????{
230????????????string?body?=?"";
231????????????string?line?=?"?";
232????????????IEnumerator?msgenum?=?msglines.GetEnumerator();
233
234????????????while(line.CompareTo("")?!=?0)
235????????????{
236????????????????msgenum.MoveNext();
237????????????????line?=?(string)msgenum.Current;
238????????????}
239
240????????????while?(msgenum.MoveNext()?)
241????????????{
242????????????????body?=?body?+?(string)msgenum.Current?+?"\r\n";
243????????????}
244????????????return?body;
245????????}
246
247????????/**////?<summary>
248????????///?刪除郵件
249????????///?</summary>
250????????///?<param?name="messagenumber"></param>
251????????private?void?DeleteMessage(int?messagenumber)
252????????{
253????????????Byte[]?outbytes;
254????????????string?input;
255
256????????????try
257????????????{
258????????????????input?=?"dele?"?+?messagenumber.ToString()?+?"\r\n";
259????????????????outbytes?=?System.Text.Encoding.ASCII.GetBytes(input.ToCharArray());
260????????????????ns.Write(outbytes,0,outbytes.Length);
261????????????}
262????????????catch(Exception?e)
263????????????{
264????????????????return;
265????????????}
266
267????????}
268
269????}
3利用socket發送郵件
/**////?<summary>
?2????????///?功能：利用Socket來發送郵件
?3????????///?</summary>
?4????????private?void?SocketSendMail()
?5????????{
?6????????????SMTP?smtp?=?new?SMTP();
?7????????????bool?bSuccess?=?smtp.Send(tbSmtp.Text,25,tbSend.Text,tbReceive.Text,tbSubject.Text,tbBody.Text);
?8????????????if(bSuccess)
?9????????????????Response.Write("<script?language='javascript'>alert('郵件發送成功！')</script>");
10????????????else
11????????????????Response.Write("<script?language='javascript'>alert('郵件發送失敗！')</script>");
12????????}
smtp類的實現如下：
1/**////?<summary>
?2????///?發送郵件類
?3????///?</summary>
?4????public?class?SMTP
?5????{
?6????????public?SMTP(){}
?7
?8????????public?bool?Send(string?strSmtpServer,int?nPort,string?strSend,string?strReceive
?9????????????,string?strSubject,string?strContent)
10????????{
11????????????/**////?smtp服務器的IP地址　　
12????????????string?smtpserver=strSmtpServer;
13????????????TcpClient?tcpc?=?new?TcpClient();
14????????????try
15????????????{
16????????????????tcpc.Connect(smtpserver,?nPort);
17????????????????StreamReader?sr?;
18????????????????string?strCmd;
19????????????????sr?=?new?StreamReader(tcpc.GetStream(),Encoding.Default);
20
21????????????????/**////服務器連接成功以后，首先向服務器發送HeLlo命令
22????????????????strCmd="HELO?shaozhd";
23????????????????SenSmtpCmd(tcpc,strCmd);
24
25????????????????/**////然后向服務器發送信件的成員的信箱
26????????????????strCmd="mail?from:"+?strSend;
27????????????????SenSmtpCmd(tcpc,strCmd);
28
29????????????????/**////向服務器發送收件人的信箱
30????????????????strCmd="rcpt?to:"?+?strReceive;
31????????????????SenSmtpCmd(tcpc,strCmd);
32
33????????????????/**////所有的準備工作都已經作好了,下面開始進行郵件的部分
34????????????????strCmd="data";
35????????????????SenSmtpCmd(tcpc,strCmd);
36
37????????????????/**////郵件內容
38????????????????strCmd="Date:?1234567\r\n";
39????????????????strCmd=strCmd+"From:?"?+?strSend?+"\r\n";
40????????????????strCmd=strCmd+"To:?"?+?strReceive?+"\r\n";
41????????????????strCmd=strCmd+"Subject:?"?+?strSubject?+"\r\n\r\n";
42????????????????strCmd=strCmd?+?strContent?+"\r\n\r\n";
43????????????????SenSmtpCmd(tcpc,strCmd);
44????????????????strCmd="\r\n.\r\n";
45????????????????SenSmtpCmd(tcpc,strCmd);
46
47????????????????/**////最后?關閉與smtp?服務器的連接
48　　　　　　????????tcpc.Close();
49????????????????return?true;
50　????????????}
51????????????catch
52????????????{
53????????????????return?false;
54????????????}
55????????}
56
57????????/**////?<summary>
58????????///?發送SMTP命令
59????????///?</summary>
60????????///?<param?name="tcpc"></param>
61????????///?<param?name="strCmd"></param>
62????????void?SenSmtpCmd(TcpClient?tcpc,String?strCmd)
63????????{
64
65　　　????　　byte[]?arrCmd;
66????????　　string?strRet;
67????????　　StreamReader?sr;
68????　　　　Stream?s;
69????　　　　s=tcpc.GetStream();
70????　　　　strCmd?=?strCmd?+?"\r\n";
71????　　　　arrCmd=?Encoding.Default.GetBytes(strCmd.ToCharArray());?
72????　　　　s=tcpc.GetStream();
73????　　　　s.Write(arrCmd,?0,?strCmd.Length);
74
75????????????/**////以下用于程序調試，顯示服務器回應信息
76????　　　　sr?=?new?StreamReader(tcpc.GetStream(),?Encoding.Default);
77????　　　　strRet=sr.ReadLine();
78????　　　　return;
79????????}
80????}
轉自http://Teerylee.cnblogs.com/

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