Enigmail: Recipient not valid, not trusted or not found

26 Apr 2011

There are 2 ways to solve the problem:

1. (more secure)
   Sign recipient’s key with yours:
   OpenPGP → Key Management → select key, right-click on it and select «Sign Key»
   If you’re not ready to tell the whole world that you trust this User ID, make Local (non-exportable) signature: it will be stored in your keyring only.

2. Go to OpenPGP → Preferences → on tab «Sending» check «Always trust user ID»