postal matters meaning in English

邮件。

The master shall take necessary measures to protect the ship and all persons on board , the documents , postal matters , the goods as well as other property carried
船长应当采取必要的措施，保护船舶和在船人员、文件、邮件、货物以及其他财产。
Before leaving the ship , the master shall direct the crew members to do their utmost to rescue the deck log book , the engine log book , the oil record book , the radio log book , the charts , documents and papers used in the current voyage , as well as valuables , postal matters and cash money
在离船前，船长应当指挥船员尽力抢救航海日志、机舱日志、油类记录簿、无线电台日志、本航次使用过的海图和文件，以及贵重物品、邮件和现金。