When using a NAT-ed Internet connection, the disclosed IP is a local network one (e.g. 192.168.1.42), which usually does not reveal too much. On the other hand, when connecting directly to the Internet, e.g. using a PPP or DSL modem and no router, the disclosed IP truly reveals the location of the amnesia user.
Upgrade to [[amnesia 0.4.1|news/version_0.4.1]], that ships with Claws Mail instead of Icedove, **and** set the following preferences in `~/.claws-mail/accountrc` for every account: