It was in May last year that the customs raided the couple's address on Gräsö in Östhammar municipality and found large amounts of drugs, including 2.2 kilos of heroin, 2.9 kilos of cocaine, 3.5 kilos of ecstasy and one kilo of methamphetamine.
Padded envelopes, vacuum machines and scales that are believed to have been used for the smuggling were also found in the home.
During the reconnaissance work, the couple was seen going around the municipality and mailing a large number of padded envelopes to buyers all over Sweden.
The buyers must have gotten in touch with the couple on the drug forum "Fly agaric 3.0" on Darknet.
They are now sentenced to ten years in prison each.
A third person who was charged was completely acquitted.
The article is updated.