IMAP -> Authenticate: NullReferenceException

[Miraichi]

Get Exception when authenticating into imap server:

   в MailKit.Net.Imap.ImapCommand.<StepAsync>d__82.MoveNext()
--- Конец трассировка стека из предыдущего расположения, где возникло исключение ---
   в System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   в System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   в MailKit.Net.Imap.ImapEngine.<IterateAsync>d__170.MoveNext()
--- Конец трассировка стека из предыдущего расположения, где возникло исключение ---
   в System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   в System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   в MailKit.Net.Imap.ImapEngine.<RunAsync>d__171.MoveNext()
--- Конец трассировка стека из предыдущего расположения, где возникло исключение ---
   в System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   в System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   в System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   в MailKit.Net.Imap.ImapClient.<AuthenticateAsync>d__84.MoveNext()
--- Конец трассировка стека из предыдущего расположения, где возникло исключение ---
   в System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   в System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   в MailKit.Net.Imap.ImapClient.Authenticate(Encoding encoding, ICredentials credentials, CancellationToken cancellationToken)
   в MailKit.MailService.Authenticate(Encoding encoding, String userName, String password, CancellationToken cancellationToken)
   в MailKit.MailService.Authenticate(String userName, String password, CancellationToken cancellationToken)

Its my simple code:

imapClient.Connect(IMAPServer.Hostname, IMAPServer.Port, true);
if (imapClient.IsConnected)
{
          imapClient.Authenticate(login, password);
          if (imapClient.IsAuthenticated)
          {
                 return true;
           }
}
return false;

[jstedfast]

Can you get me a protocol log? Trying to diagnose this problem using that async backtrace is impossible and I can't replicate the issue. Check the FAQ to see ho to get this protocol log.

[Miraichi]

Protocol log:

Connected to imap://in.alice.it:143/?starttls=when-available
S: * OK IMAP4 PROXY server ready
C: A00000000 CAPABILITY
S: * CAPABILITY IMAP4rev1 UIDPLUS LOGIN-REFERRALS NAMESPACE QUOTA CHILDREN AUTH=CRAM-MD5 AUTH=PLAIN
S: A00000000 OK capabilities listed
C: A00000001 AUTHENTICATE CRAM-MD5
S: + PDFCRDI5QzdEQTNDNDU5QjcwMzYxQkFFODM2N0QwQzIxMTRCQzVFOTFAbHAzMXQtYWxpY2UuY3AuYWxpY2UuaXQ+
C: XXX
S: * BYE disconnecting
S: A00000001 NO you are not allowed to act as a proxy server

Upd:
Its because i set proxy? Without proxy i don't get Exception.

Connected to imap://in.alice.it:143/?starttls=when-available
S: * OK IMAP4 PROXY server ready
C: A00000000 CAPABILITY
S: * CAPABILITY IMAP4rev1 UIDPLUS LOGIN-REFERRALS NAMESPACE QUOTA CHILDREN AUTH=CRAM-MD5 AUTH=PLAIN
S: A00000000 OK capabilities listed
C: A00000001 AUTHENTICATE CRAM-MD5
S: + PEMxNTQwQTk1QTM4N0I3NURDN0I5NkIwNDhGMUNBNkMwMkNEODE5MDhAbG9naW5wcm94eTRiLWFsaWNlLmNwLmFsaWNlLml0Pg==
C: XXX
S: A00000001 OK authentication successful

[jstedfast]

Thanks for the info, I've got a fix for the NullReferenceException now. I'm not sure what can be done about the proxy error from the server...