After Royal Mail's international services were fully restored, people can now send packages and mail internationally through post offices.
It comes after a cyberattack in January that severely hampered international mail delivery at the postal company dot.
Although services were back online, 11,500 Post Office branches were still without them.
Royal Mail reported that with "some delays," it was now processing "close to normal daily volumes" of international mail.
"International export services have now been reinstated to all destinations for purchase online and through our shipping solutions," the spokesperson added.
After the 10 January ransomware attack, Royal Mail customers were advised to stop sending packages and mail internationally.
Long delays for customers were brought on by the backlog it created.
The cyber incident was attributed to the Russian-based ransomware group Lockbit.
With the option to drop off items at a Post Office location or have them collected at home, Royal Mail gradually resumed its online services.
But Neill O'Sullivan, managing director parcels and mails at the Post Office, said postmasters had been left unable "support businesses and consumers" wanting to send parcels and mail abroad.
It has been a difficult time for many small businesses because post offices are essential to their organizational structure, he said.
"These past weeks have been difficult for postmasters who through no fault of their own have missed out on remuneration for providing international mail services," he added.
The Post Office said it was giving extra money to postmasters for handling international items in new fixed payments for each transaction.
The problems have coincided with ongoing strikes by Royal Mail postal workers which have affected domestic deliveries.
On strike days, the postal firm has been unable to deliver first and second-class letters. However, it says it will deliver as many parcels and Special Delivery letters as possible.