由於意外的數據包格式記錄到Pop3而導致握手失敗

我試圖更新監視Exchange Server郵箱的代碼，以便它可以使用SSL登錄。然而，當它試圖登錄時，我得到的錯誤：The handshake failed due to an unexpected packet format.由於意外的數據包格式記錄到Pop3而導致握手失敗

我的連接代碼如下（有記錄和評論刪除）：

ServicePointManager.ServerCertificateValidationCallback += (o, c, ch, er) => true; 

try 
{ 
    tcpClient = new TcpClient(Host, Port); 
} 
catch (SocketException e) { ... } 

try 
{ 
    var stream = client.GetStream(); 
    ssl = new SslStream(stream); 
    ssl.AuthenticateAsClient(Host, null, SslProtocols.Tls, true); 
    streamReader = new StreamReader(ssl); 

    response = streamReader.ReadLine(); 
    if (response.StartsWith("+OK")) 
    { 
     response = SendReceive("USER ", UserName.Trim() + "@" + Domain.Trim()); 
     if (response.StartsWith("+OK")) 
     { 
      response = SendReceive("PASS ", Password); 
     } 
    } 

    if (response.StartsWith("+OK")) 
     result = true; 
} 
catch (Exception e) { ... }

從日誌記錄，我已經精確定位的例外在第二次嘗試之後的前4行中的某處（實際上在GetStreamReader方法中，但爲了簡潔和可讀性，我將它組合在一起）。

，我收到異常下面是：

--- Exception --- 
Error: 3/8/2016 10:32:35 AM The handshake failed due to an unexpected packet format. 
Info: 3/8/2016 10:32:35 AM There was an error connecting to the account. 
The server returned 
The handshake failed due to an unexpected packet format. 
Info: 3/8/2016 10:32:35 AM Source: System 
Info: 3/8/2016 10:32:35 AM Method: Void StartReadFrame(Byte[], Int32, System.Net.AsyncProtocolRequest) 
Info: 3/8/2016 10:32:35 AM  
    at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) 
    at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) 
    at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) 
    at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) 
    at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) 
    at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) 
    at System.Net.Security.SslStream.AuthenticateAsClient(String targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, Boolean checkCertificateRevocation) 
    at POP3_Communication.Pop3.GetStreamReader(TcpClient client) 
    at POP3_Communication.Pop3.Connect()

來源

2016-03-08 Tim

可能重複的[System.IO.IOException：握手失敗，由於意外>數據包格式？]（http://stackoverflow.com/questions/5178757/system-io-ioexception-the-handshake-failed-由於對一個-意想不到分組格式） –

我可以縮小範圍，進一步根據您的異常堆棧跟蹤:)

at System.Net.Security.SslStream.AuthenticateAsClient(String targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, Boolean checkCertificateRevocation)

的問題是，你要連接到一個端口沒有啓用SSL（即您可能連接到端口110而不是995）。

您是否考慮過使用庫如MailKit而不是自己的解決方案？

來源

2016-03-08 21:04:21 jstedfast

由於意外的數據包格式記錄到Pop3而導致握手失敗

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