Decrypted message; Error - signature verification failed when replying


I ran into this problem while testing the encryption/signature with gpg4win and Thunderbird/Enigmail and and Gpgtools.

  • So first I send an encrypted ans signed message from
  • I receive it under Windows/Thunderbird an can decipher it, and I get also a “good signature” message.
  • I reply to this e-mail from Windows, I can then decipher it, and I get also a “good signature” in Mac OS
  • I decide to reply again from Mac OS/
  • On Windows, I can decipher the message, BUT I get a “Decrypted message; Error - signature verification failed” error message.

So what’s wrong in the process? Did I miss something?

Thanks for the help.