修订

Nina E Updated the path and the URL in the Help Center link at the top of the page.
Nina E Added a link at the top of the page to the official documentation.
... Change title to better match content
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... Update based on recent testing results
Shal Farley limited matching (I think, needs review)
Shal Farley Clarify "the same" Subject
Shal Farley Removed redundant "Threading" in the initial heading.
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... Add more detail about threading info
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Shal Farley added caveat "if you are a moderator"
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... Mark changed web post threading to match that of email on 18DEC2018
... Refer to wiki page for splitting, with a link (rather than the system help, which does not address it)
Frances 更新页面
Frances 更新页面
Frances 更新页面
Frances 更新页面
Frances 更新页面
Frances 更新页面
Frances 更新页面
Frances 首页