[Imaplib2-devel] HEUREKA, Missing mails log snippet (found it)

[Sebastian Spaeth]

On Wed, 08 Jun 2011 17:25:37 +0200, Sebastian Spaeth <Sebastian at SSpaeth.de> wrote:
> On Wed, 08 Jun 2011 16:38:37 +0200, Christoph Höger wrote:
> > great Work! Is this behaviour specified in some RFC or is it the
> > mailservers fault?
> 
> Well, the RFCs are certainly fuzzy enough to not specify it precisely,
> although my interpretation of the FETCH description on page 53 of
> http://www.networksorcery.com/enp/rfc/rfc3501.txt and the example given
> therein does not seem to allow interspersed replies.

After re-reading specs, I stand corrected. RFC 3501 specifies 2 types of
server replies, untagged, and tagged and we need to cope with it. This
is not the servers fault... The relevant part is:

   The client MUST be prepared to accept any response at all times.

   Status responses can be tagged or untagged.  Tagged status responses
   indicate the completion result (OK, NO, or BAD status) of a client
   command, and have a tag matching the command.

   Some status responses, and all server data, are untagged.  An
   untagged response is indicated by the token "*" instead of a tag.
   Untagged status responses indicate server greeting, or server status
   that does not indicate the completion of a command (for example, an
   impending system shutdown alert).  For historical reasons, untagged
   server data responses are also called "unsolicited data", although
   strictly speaking, only unilateral server data is truly
   "unsolicited".

Sebastian
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