After days my friend found the way to setup Thunderbird to send and receive mail from Riseup, one of the Radical Technology Collectives that work to keep activist communication channels secure. They provide IMAP for downloading your mails, and downloading your mails is the preferred method indeed, even more so if you want to use PGP for encrypting emails as well. Tutorials on their pages were for an old Thunderbird version that didn't look like what we had in the latest Ubuntu. The winning combination:

• Edit > Preferences > Privacy > Security > Verification > Do not use OCSP
• Account Settings > your@riseup.net > Server Settings > Incoming options: IMAP, mail.riseup.net, port 143, TLS, do not use secure authentication
• Account Settings > Outgoing Server > SMTP, mail.riseup.net, port 465, SSL

And the PGP worked (of course with the Enigmail plugin installed) with setting "Use pgp-agent" off:

• OpenPGP > Preferences > Advanced > Do not use gpg-agent.

Ps: At some point i will detail how we configured a PUSCII (another Radical Technology Collective) email address for Emacs and Mew on another friends' computer.

• 2008-01-29 18:00
• Sirály, Király utca 50.
• Titkosított levelezés
• Anoním Internetezés
• Hozd el a számítógéped!

Vigyázz a seggedre a kibertérben és alázd meg a társadalmi kontroll mindenttudó isteneit! A műhely során elsajátíthatod az Internetes lopakodás alapjait, mint a PGP használata titkosított levelezéshez és az anoním szörfölés Tor-al. Az említett technológiák hatékonyabb alkalmazása érdekében azt is megtanuljuk, hogy hogyan szerezzünk kalóz email címet és hogyan futtassunk böngészőt pendrive-ról.

• 2009-01-29 18:00
• Sirály, Király utca 50.
• Encrypted emailing
• Anonymous browsing
• Bring your computer!

Watch your back in cyberspace and defy the omniscient gods of control society! The workshop covers the very basics of online stealth like email encryption with Pretty Good Privacy and anonymous browsing with Tor. In order to take more advantage of these technologies we will learn how to get a pirate email address and how to run an Internet browser from a pendrive. No special prior knowledge required.