On 8/22/2012 10:29 PM, Erik Friesen wrote:
> Is there any way the users list software could combine a slightly changed
> subject line?
>

Erik:

I'm not sure what you are asking.

What users-list software are you referring to?

I suspect you are actually asking about details in the headers of the 
messages that form this thread.

According to RFC 2822 (and others), a reply should contain a Reference: 
header and/or an In-reply-to: header containing message-id(s) of 
previous messages in the thread. Mail agents (e.g., Thunderbird, etc.) 
are supposed to use this message-id, not the subject line, to identify 
message-membership in the thread. With this scheme one can change the 
subject line entirely and still maintain the thread.

Unfortunately, scanning the headers of a number of messages sent to this 
list shows some of us are using mail agents that don't honor this RFC 
requirement and break the threads.

If you are asking something else please ask again.

Regards,
Kent


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