öidmailid

öidmailid is a term of Estonian origin that translates to "night mail" in English. It refers to the postal service that operates during nighttime hours, typically involving the transportation of mail by road or rail to facilitate earlier delivery times in the morning. This system is designed to optimize the efficiency of mail sorting and distribution by utilizing the off-peak hours of the night.

The concept of night mail services predates modern overnight couriers and was particularly crucial in the era before widespread air travel. By collecting mail from various locations in the evening, sorting it at central hubs throughout the night, and then distributing it to local post offices before the start of the business day, öidmailid aimed to reduce the overall transit time for letters and packages. This was especially important for time-sensitive correspondence and newspapers.

In many countries, öidmailid operations were often conducted by dedicated mail trains that ran on railway networks, traveling between major cities. These trains were equipped to handle large volumes of mail and were a vital component of national postal infrastructure. While the advent of air cargo has altered the landscape of mail transportation, elements of night mail operations continue to exist in various forms, adapted to modern logistics and delivery expectations. The term öidmailid, though specific to Estonian, encapsulates this historical and functional aspect of postal services worldwide.