Just changing the topic of an e-mail reply but still doing a "reply to" doesn't create a new topic. (It actually didn't in Yahoo, either)
You need to follow the instructions here to start a new topic:
Email Notifications and Replies (http://www.foreforums.com/index.php?topic=10141.0)
It did in Yahoo in my experience. Or am I remembering something before it happened again? ;o)
best, paul
I've had a fair amount of experience going through the Yahoo database and trying to make sense out of the threading, and from what I've found their algorithm would do one of 3 things distinct things when this was done (e.g. changing the subject of a reply to message)
1) It may keep this new 'topic' in the original topic thread but as a new sub branch.
You could see this when a topic would contain one or more sub topics on top the base topic. Kind of a main branch with many sub branches that dead end. This tended to occur most often when the response came from a yahoo email as yahoo groups used a special header to keep track of where the topic was supposed to go. Yahoo mail would honor this special header but other mail clients would not.
2) It may place the message in another topic by the same subject name.
If it could not find the special header to know where the reply was supposed to go then it would perform a full database search attempting to match the email subject to an existing topic subject. Now assuming it found a match, that's where the message would go. There are a plethora of examples of this behavior where you would have a topic that was many years old and suddenly have a new response. Of course the response had nothing to do with the thread that yahoo selected but that's what it did. I've found responses 7 years later in a topic, most often occurring when common message subjects were used. If you were watching via email you might think you started a new topic but in fact what you did was reply to an old topic.
3) If 1 and 2 failed, then it would start a new topic with the subject of the email.
Sometimes someone would correct a spelling error in a subject on a reply and this would also start a new topic and then you would have some reply's going in to two different topics that were in fact the same. Sometimes Yahoo would get confused by the Re: Re: Fw: in the subject and again start a new thread making it even more convoluted.
So anyway yahoo was a box of chocolates when it came to determining what it would do with a reply, you never knew what you would get. When the yahoo database was imported into ForeForums many of these threaded issues were fixed but not all of them as they were beyond program logic, more Rosetta stone in their complexity.
So on foreforums if you reply to an email from the system, it's going back to the topic that the message was from, always.
If you want to start a new topic then change both the subject and to address. For example send it to foretravel@foreforums.com (general foretravel discussion board) or techtalk@foreforums.com (technical discussion board). There are other emails and boards as well but those are the two most common. Email to those address are assumed to be new topics as long as they are not replies, always.