​The need for communication between Sweden and the Finnish addition became more prevalent. Therefore the already existing inclusion of Aland farmers to support the King of Sweden's officials as well as soldiers along the route was to be extended for a regular postal service.​ 

 

In the 16th century the King of Sweden, Gustavus Wasa, set the foundation for an organized postal service through the route by starting to compensate local farmers for their efforts as well as initiating the system of inns for providing shelter, accommodation and food along the route through Aland. ​

 

With the Mail Decree of 1636 the postal services from Sweden to Finland across Aland were officially put in place. This included tax relief for involved farmers, a set route with relay "stations" between each of them a farmer was responsible to carry the mail. The farmer was bound by oath and had to deliver the mail taken over within a certain time to the next relay. If not compliant the farmer could be punished. 

 

​The mail would come from Stockholm and the route including Aland would start in Grisslehamn (Väddö) in Sweden, arriving in Aland's Storby (Eckerö), then be forwarded through the main island of Aland to Bomarsund. From Bomarsund the route was passing the islands of Vårdö, Kumlinge and Brandö before eventually delivered at the mainland of Finland in Gustavs. The final destination was Åbo (Turku) in Finland. The reverse route was regularly served as of 1638. 

 

The postal route was in place until 1910 when it was entirely replaced finally by steam ships.

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