Hi, I'm sure that "Date "header is not mandatory at all in the 200 OK to a 
REGISTER. In fact I don0t know a registrar adding it.

But RFC 3261 says:
------------------------------------------------------------------
10.3 Processing REGISTER Requests

     8. The registrar returns a 200 (OK) response.  The response MUST
         contain Contact header field values enumerating all current
         bindings.  Each Contact value MUST feature an "expires"
         parameter indicating its expiration interval chosen by the
         registrar.  The response SHOULD include a Date header field.
------------------------------------------------------------------

But it also says:
------------------------------------------------------------------
  10.2.5 Setting the Internal Clock

   If the response for a REGISTER request contains a Date header field,
   the client MAY use this header field to learn the current time in
   order to set any internal clocks.
------------------------------------------------------------------


So? is that "Date" header a SHOULD or a MAY?




-- 
Iñaki Baz Castillo
[EMAIL PROTECTED]

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