[Mailman-Users] pipermail+archives

[Mark Sapiro]

Jean-Philippe GIOLA wrote:
>
>I have seen in the list I use that these 2 headers are not all the times 
>existing, even if the mail that has been sent is an answer.
>Perhaps it depends of the MUA.

Yes, it depends on the MUA. The standard says these headers SHOULD be
included, not that they MUST be, so it is not wrong to omit them and
not all MUAs include them.

You will see in the pipermail archives of this list for example that
meaasges which contain neither of these headers are not threaded to
prior messages with the same subject even though the content shows
they are clearly replies.

You will also see totally separate threads merged into one in the
archive because someone begins a new thread by 'replying' to a prior
message.

--
Mark Sapiro <msapiro at value.net>       The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan