In a statement on the diocesan website, Cardinal Cresenzio Sepe said none of the identified priests worked in Naples.
But he said he decided to forward the file to the Vatican because "there remains the gravity of the cases for which those who have erred must pay the price, and be helped to repent for the harm done."
The dossier, containing WhatsApp chats and other evidence, was compiled by a self-proclaimed gay escort, Francesco Mangiacapra.
"We're talking about sins, not crimes," the escort was quoted as saying in the statement.
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It's the latest sex scandal to convulse the Italian church and the Vatican.
Last month, a Vatican judge pleaded guilty in a Rome tribunal to having child porn on his computer after police were brought in when he allegedly tried to fondle an 18-year-old man.
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