[Trisquel-users] Import public key

[giorgio . benedetto1960]

Hello,
I just installed Trisquel 8 (italian language) and would like to import a  
public key to use it with Enigmail. I choose System -> Preferences ->  
Personal -> Password and key then File -> Import , then I select the file  
with the public key (generated by Flowcrypt in Gmail) but I get the message   
"import not successfull : no valid user IDs". Can you please help me to  
import public keys ?
Thank you