Hi,
> Can I obtain you open PGP key for tails-testers@??? e-mail?
tails-testers is a public mailing list and therefore does not use a PGP key.
If you need to user support, you may use these channels:
https://tails.boum.org/support/index.en.html
In particular tails-support-private@??? which is an encrypted and
non public mailing list using this key:
https://tails.boum.org/doc/about/openpgp_keys/index.en.html#support
Cheers!
u.