Scott Vernon wrote:

Oh, I didn't realize it meant in the header. But why then can I reply
to others in the same thread?

It depends on what gets written into the field. I can't remember exactly
what goes there, but it might be a series of message IDs, some of which can
be very long. The message ID depends on the server used by the person
originating the message - you can have a branch of a thread that is loads of
messages deep and still be able to reply to it if it so happens that the
posters in that branch all used a server which generated short IDs; but a
branch that is only a few posts deep could hit the limit if the posters'
servers generated long IDs.

IIRC, the proper way for a newsreader to handle the field is to strip out
the earlier references, thus ensuring that the length stays reasonable, but
OE just keeps adding new ones. (I might be wrong about that, it's been a
while since I read about it.)


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