How many posts are allowed in a private message and topic total?

サポート
1

On our forum, an old topic was repeatedly closed after I think 10000 replies, and there were about 20000+ replies.
So is it the same with private messaging?
How many posts can be in each?

2

Please review:

「いいね！」 8
3

Thank you!
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「いいね！」 1
4

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