Paolo Gabriele's sentence was reduced to 18 months from three years because of mitigating circumstances, including that Gabriele had no previous record, had worked for years for the Holy See.
Gabriele also acknowledged that he had betrayed the Pope and was convinced, "albeit erroneously" that he was doing the right thing, according to Judge Giusppe Dalla Torre.
Gabriele was accused of stealing the pope's private correspondence and passing it on to journalist Gianluigi Nuzzi, whose book revealed the intrigue, petty infighting and allegations of corruption and homosexual liaisons that plague the leadership of the Roman Catholic Church.
More top news
All weekend it felt as though the new administration had a self-destruct button and was desperately searching for it.
Areas of dense freezing fog could mean possible delays to air travel until 10.30am, according to forecasts.
Survey shows support for compulsory sex and relationship education classes as students struggle to deal with online sexual harassment.