Do postal services get paid for delivering mail from abroad? | Notes and queries

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific conceptsWhen you post a letter internationally, you pay postage to the postal service of the country where the letter is sent from. For instance, if I send a letter from Britain to France, I pay for a Royal Mail stamp, so the British postal service gets paid to process the delivery of the letter. When the letter reaches France, the French postal