Alitalia has focused mostly on domestic routes since a group of Italian businessmen relaunched a slimmed-down airline in 2009 after Air France-KLM's failed takeover bid. Air France remains the main shareholder with a 25-percent stake.
Analysts say the rescue would better position Alitalia to negotiate other alliances to help it reposition itself in the market.
The government hailed the synergies between Alitalia and the postal service, citing the postal services cargo and passenger service.
However, airline analyst Oliviero Baccelli at Milan's Bocconi University said the postal services participation would be mostly a financial one, and that there were not true synergies given that Alitalia sold off its cargo business five years ago, and that the postal service operates different aircraft than Alitalia and from an airport in Brescia not served by Alitalia.
To return to profitability, Alitalia should focus on longer-range flights toward the Middle East, Asia and South America, Baccelli said.
The airline's margins have been hurt by Italy's recession, higher fuel prices and higher environmental and airport taxes.
- AP