Hi there,

we recognized that people paranoid enough to use tor
are still dumb enough to use plaintext-authentication protocols like pop3 and telnet.
They might think it’s “secure because tor encrypts it”.
This isn’t the case.

it’s encrypted, but …
… communication from client to entry node and exit node to server will still remain as is.
Pop3, telnet and others will still be plain-text and thus subject to sniffing.

Links extern:
unixgu.ru :: tor
H Zero Seven | Unix/OSS Development & Research Team since 1999