Minimum posts before starting a new thread

[kiawah75]

Sorry if this has already posted in the forum, but I keep on getting a search error using the search term in the title(error is at the end of my post)

I would like to allow users to start a new thread in one of my forums (introductions) but for all the rest of the threads, I would like them to have a minimum of five posts before they can start a new thread. Almost all of the spam I get is from people starting new threads.

Do you know if this is possible, if so how? Thanks in advance for your help.

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Search Error

The search term you specified (a) is under the minimum word length (3) and therefore will not be found. Please make this term longer.

If this term contains a wildcard, please make this term more specific.