* Domestic OperatorsThere are currently 32 registered Domestic Operators in Sweden, the list of all of them can be found at the state agency PTS; http://www.pts.se/upload/Ovrigt/Post/lista-postoperatorer.pdfPosten AB from that list, or Posten as they are more commonly called is the main active one. For more information see https://en.wikipedia.org/wiki/Posten_AB - what doesn't appear in the english article which can be seen in the swedish one is the swedish mail system was a monopoly up until 1993, after the deregulation things have mostly stayed the same except for the majority of delivery points getting moved from large postal centers to various grocery stores and likewise.* PricesEach normal stamp in Sweden has the price of 6 SEK. For a list on how many are needed versus the weight domestically, see http://www.posten.se/sv/Kundservice/Porto%20och%20pris/Sidor/Portotabell-for-brev-inrikes.aspx - it's in Swedish but it can be read if you know "Max vikt i gram" means maximum weight, "Pris" means price and "Antal valrlsa frimrken" means how many stamps are needed. For sending to Europe the prices are generally twice as much in comparison, as can be seen on http://www.posten.se/sv/Kundservice/Porto och pris/Sidor/Portotabell-for-brev-utrikes-Europa.aspx and finally for sending something internationally refer to http://services3.posten.se/ptm/bin/ptmpdf?objectid=0000.12693 and the column "Utanfr Europa, pris". To give some short examples to those who won't open the links, 100 grams domestically costs 12 SEK, 100 grams within EU costs 24 SEK, 100 grams internationally costs 28 SEK.* MailboxesMailboxes in Sweden are handled by Posten, and images of them can be found by searching on "Posten Postldor" (it's the yellow and blue ones). Maximum height of the package is 3.0 centimeters or it won't fit, weight can be a maximum of 2.0 kilograms. If a package reaches certain dimensions or weighs too much it will be delivered to a delivery point near a person instead of straight to the post box.* Seizureshttp://arbetarbladet.se/nyheter/gavle/1.2501033-drogerna-kommer-med-posten (Swedish so I would recommend http://translate.google.com) The article talks a bit how drugs are more common in the mail and that postal employees are not allowed to open mail under any circumstances, but they suspected something when they got the exact same type of packages all the time. They reported it to the police, who reported it to a prosecutor got a warrant to open the mail and found the drug spice in it - then there's the usual moral BS which is probably not unique to Sweden but likely a bit worse than others.http://www.svd.se/nyheter/inrikes/knark-pa-posten-okar_839181.svd (Same as above translation wise) Talks a bit about how the customs works here but also reveals customs work on postal employees reporting stuff, and that they have seized normal envelopes on tips alone. It also mentions they have no trouble letting a customer accept a package to then make a raid on that address after it's been delivered (there are no controlled deliveries in Sweden with Posten, either it gets delivered to the post box or you pick it up at a delivery node nearby).* Insider PerspectivePosten has their own YouTube-channel with a few videos which show how they work, all in Swedish: https://www.youtube.com/user/PostenLogistikAB/videos* Outsider PerspectiveThe Swedish alphabet is 29-letters instead of the traditional 26, the three following added letters are as follows in lower-case/upper-case respectively:  / ,  /  and  / .Sweden has some of the most restrictive drug laws in Europe, and if decriminalization or legalisation occurs in Europe at some point Sweden will almost guaranteedly be the last country to adopt it.Hopefully this post has given some insight for those not living in Sweden. :)For those posting after me, keep in mind you don't necessarily have to follow the way I wrote my post.