question about (this) maillist(s)

[Ronald Warsow]

hallo

i have some questions how this mail list "management software (mailman ?, ...)" works:

1. why is the timestamp in the mailheader changed ? sometimes ?

https://www.redhat.com/archives/fedora-test-list/2006-August/msg00496.html

sended at  Date: Sun, 27 Aug 2006 23:13:56 +0200 
changed to Date: Sun, 27 Aug 2006 21:13:53 +0000

(the mail arrived 1 minute later !)


2. what is the sort order or better on what criterion does the software manage/sort mails to the related subjects ?

sometime i can see that the software "guesses" this relation leading to entries like
...
<Possible follow-ups>
...


what is the technical background ?

hint:
i send mail to the list via evolution by picking the subject and write "re:" or "Re:" in front of it;
in contrast to download the whole list and doing a "Reply to Sender" from the evolution menu. 


tips/hints ?

ronald