Suopelto's post office served as a meeting place for villagers and summer residents for decades. During the post and shopping trip, people exchanged stories about the village and talked about current topics. There wer public telephones at the post office and in the courtyard building of the Cooperative, at a time when telephones were not common in own houses. The third telephone in the region was found in the Ilola mansion. When summer residents arrived at their cottages in the spring, they were the first to go to the post office and update themselves on the village's winter events and news.
The Suopelto post office previously operated for a long time in Kaunisto, where Anselm and Ida Kaste were postmasters from 1945 to 1966. When Ida retired in 1966, Helmi Virolainen (1923–2008) was chosen as the new postmaster. In this connection, Suopelto Cooperative began to renovate a place for a post office. During the renovation, in the spring and winter of 1966, the post office operated at Helmi Virolainen's home in Sulkala. From the summer of 1966 to 1974, the post office operated on the property of the Cooperative. The entrance to the post office was on the beach side wall of the store, where there was also an entrance to the store manager's home. The entrance to the shop was on the side of the front yard. After the cooperative closed its operations, the post office moved to the opposite Kumpu property, where it operated until its closure in 1986, after which Helmi retired. Helmi's son, Hannu Virolainen, continued in his mother's footsteps, working for Posti as a mail carrier.
The day of the post office included many kinds of coincidences. One day, the hermit of Päijänne, Toivo Pylväläinen, arrived to do business as always, but this time he demanded to see all the money saved in his bank book. The branch's cash register was small, so Helmi explained to Toivo that his money is not in the branch, but is written in the bank book. This answer did not satisfy the hermit, and as he left he grimly muttered that next time he would have to see his money. Weeks, even months, passed until Pylväläinen once again came to do his business, this time with a long stick. He renewed his question about making the money visible and stepped up his wish to tap the corner of Helmi's desk with a stick. Helmi always got along well with people and calmed Toivo with his gentle Karelian dialect: "Kuleha sie Toivo. You can't see the money, but it's still there." That was the situation.