[Tickets #11413] Re: Getting error he mail server does not support IMAP4rev1 (RFC 3501).

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Ticket URL: http://bugs.horde.org/ticket/11413
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  Ticket             | 11413
  Updated By         | Jan Schneider <jan at horde.org>
  Summary            | Getting error he mail server does not support IMAP4rev1
                     | (RFC 3501).
  Queue              | Horde Base
  Version            | 4.0.15
  Type               | Bug
-State              | Feedback
+State              | Not A Bug
  Priority           | 2. Medium
  Milestone          |
  Patch              |
  Owners             |
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Jan Schneider <jan at horde.org> (2012-09-26 16:26) wrote:

>> This happens if the IMAP server doesn't return an IMAP4REV1
>> capability. If this is intermittent, it's probably some sporadic
>> issue with your IMAP server returning response. You can enable IMAP
>> logging to see the communication.
>
> It's connecting to postfix. Not sure which version or which  
> additions as I'm not in charge of the server.

Postfix is not an IMAP server. But if you are not able to debug the  
server, there isn't much we can help you with anyway.

> But if it can't use IMAP4REV1 then surely it should just fall back  
> to IMAP4 rather than stopping working entirely (I can't view the  
> inbox etc).

That's not how IMAP works. Talk to your mail server administrator.