Well, this is a very special problem.
Sometimes I need to route my traffic tough a socks proxy (nclusive dns requests) and I can`t use Thunderbirds internal Proxy settings cause the dns requests won`t work. Solution: I start first Freecap or Sockscap. With Freecap/Sockscap I start Thunderbird. All traffic (inclusive dns requests) goes thought the socks proxy then. It works without any problems for mail and for firefox aswell.
But not with engimail. With Freecap it will sa can`t find gpg.exe and with Sockscap it finds them and executes them in foreground (not in backround) and nothing will work.
Maybe I just need to set another working directory?