●違法性に関する議論
メールに関して、公然性がない
https://monolith-law.jp/reputation/publicity-and-propagation-potential-in-defamation
https://monolith-law.jp/reputation/defamation-and-transmission-possibility-by-sending-email
対抗言論だから許される
https://monolith-law.jp/reputation/cases-not-recognized-as-defamation
●損害が少ない
https://monolith-law.jp/reputation/compensation-for-defamation-damages
●反訴(相手方の名誉毀損について)
https://monolith-law.jp/reputation/defamation-counterclaim-flow