In my websites, I have various links to my favorite philatelic and deltiologic websites:
MPPC= Mailer's Postmark Permit Club
http://www.mppclub.org/HowToObtain.htm
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LPCS= Local Post Collectors Society
http://www.localcollectorspost.org/
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Postcard exchange site postcrossing.com. I especially like forum.postcrossing.com
http://www.forum.postcrossing.com/
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Virtual Stamp Club; I especially like the forum (click on the green rectangle Start reading)
http://www.virtualstampclub.com/
http://forums.delphiforums.com/stamps/start
http://www.virtualstampclub.com/hotlink.html
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Philatelic forum USA-centric bidstart.com (again, see the forum; also, many interesting items are available to buy!)
http://www.bidstart.com/
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Philatelic forum Australia-centric stampboards.com. Yet again, see the forum. The most lavishly illustrated forum with images of stamps, mainly hosted at photobucket.com
http://stampboards.com/
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Global philatelic networking site myphilately.com:
http://www.myphilately.com
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While we are at it, please visit my websites/webpages, too.
Philately (stamp collecting) in general, and maximaphily in particular, as a confluence of domains: learning, writing, web design, business administration, etc.
http://dorincard.blogspot.com
http://dorinco.webs.com
http://www.squidoo.com/
http://www.delcampe.com/
http://www.zazzle.com/dorinco*
http://s289.photobucket.com/